Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ty » sach ty
lang van » dang van, tang van, hoang van
hieu cua » hieu qua, dieu cua, bieu cua
lang xa » lang ha, dang xay
cac xuc » cam xuc, cac nuoc, chat xuc
xuc ban » duc ban, cuc ban, quoc ban
ban anh » ban hanh, ban banh, ban danh
anh hai » lanh hai, manh hai, anh thai
hai cua » thai cua, dai cua, hoi cua
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: vu khach ty ((lang xa) or (lang van)) hoi. hieu cua cac xuc ban anh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty ((lang xa) OR (lang van)) hoi. hieu cua cac xuc ban anh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu khach ty ((lang xa) or (lang van)) hoi. hieu cua cac xuc ban anh hai cua tre*.