Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
van dung » van dong, xay dung, tin dung
dung dai » duong dai, dung tai, dung dat
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang ha hoi. ((hieu va) or (hieu van)) cam tuc van dung dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang ha hoi. ((hieu va) OR (hieu van)) cam tuc van dung dai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang ha hoi. ((hieu va) or (hieu van)) cam tuc van dung dai cua tre*.