Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
thuat san » thuat toan, thuat song, thuat lanh
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
tuc va » truc va, tuc xa, duc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat san)) ky nang mai hoi. hieu van cam ((tuc va) OR (thuc va)) thanh tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat san)) ky nang mai hoi. hieu van cam ((tuc va) OR (thuc va)) thanh tri cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat san)) ky nang mai hoi. hieu van cam ((tuc va) OR (thuc va)) thanh tri cua tre*.