Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh day » hanh may, han day, hanh dao
hieu van » hieu va, thien van, lieu va
day cua » dai cua
truc va » thuc va, thuc vat, trung va
te sach » toc sach
van lam » van nam
tu nong » tu cong, tu tong, tu tuong
tuc va » thuc va, tuc xa, duc va

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 ((tu nong) OR (tu dong)) xa hoi. hieu van lam ((tuc va) or (truc va)) hanh day cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nong) OR (tu dong)) xa hoi. hieu van lam ((tuc va) OR (truc va)) hanh day cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nong) OR (tu dong)) xa hoi. hieu van lam ((tuc va) or (truc va)) hanh day cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nong) OR (tu dong)) xa hoi. hieu van lam ((tuc va) or (truc va)) hanh day cua triet*.