Perhaps you should try some spelling variations:
kinh dao » minh dao, dinh dao, kinh do
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cua triet, dua tren
va kinh » va tinh, qua kinh
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang xa hoi. hieu van cau truc va kinh dao ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. hieu van cau truc va kinh dao ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang xa hoi. hieu van cau truc va kinh dao ((cua tre) or (cuu tre))*.