Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
dung dai » duong dai, dung tai, dung dat
vu khach » vu khanh, vu khac, vay khach
vat dung » van dung, va dung, viet dung
vu sach » vu bach, su sach
tuc vat » thuc vat, tuc va, tuc hat
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
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) OR (vu khach)) ky lang ha hoi. ((hieu va) or (hieu van)) cam tuc vat dung dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky lang ha hoi. ((hieu va) OR (hieu van)) cam tuc vat dung dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky lang ha hoi. ((hieu va) or (hieu van)) cam tuc vat dung dai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ky lang ha hoi. ((hieu va) or (hieu van)) cam tuc vat dung dai cua tre*.