Perhaps you should try some spelling variations:
hoang van » hang va
manh hai » lanh hai, minh hai, thanh hai
ban manh » ban hanh, van manh, ban mach
hai cua » thai cua, dai cua, hoi cua
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach y)) ((nang xa) or (hoang van)) hoi. hieu qua cac xuc ban manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ((nang xa) OR (hoang van)) hoi. hieu qua cac xuc ban manh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) ((nang xa) or (hoang van)) hoi. hieu qua cac xuc ban manh hai cua tre*.