You say "Hachi tov be"
kol tuv (כל טוב)
I think you meant to say "the best IN the world". It is hatov ba'olam.
best of the best = הטוב ביותר (hah-TOHV beh-yo-TEHR)
The typical phrase is, "acharon, acharon chaviv" (last is the best)
You say 'Yalda' in Hebrew
yadua hatov beyoter (ידוע הטוב ביותר)
Has in Hebrew is: YESH
"Tikra" (תקרה) is how you say ceiling in Hebrew.
The best thing is to say "mazal tov", spelled:!מזל טוב
The best way is to say mah karah (מה קרה) which literally means "what happened?" but it is implied that it refers to problems.
"Boyfriend" in Hebrew is "khaver."
Mustache is 'Safam' in Hebrew