Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
doc sach » hoc sach, toc sach, nuoc sach
danh vai » danh sai, danh va, doanh van
lang van » dang van, tang van, hoang van
lam duoc » nam duoc, luat duoc, lam thuoc
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
duoc va » nuoc va, duc va, duoc ma
te sach » toc sach
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
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: ((te sach) or (doc sach)) ky lang van hoi. ((hieu van) or (hieu va)) lam duoc va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ky lang van hoi. ((hieu van) OR (hieu va)) lam duoc va danh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ky lang van hoi. ((hieu van) or (hieu va)) lam duoc va danh vai cua tre*.