Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
lam chat » luan chat, cao chat, ly chat
hanh lam » thanh lap, hanh kem, hanh va
thi hanh » thi thanh
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
te sach » toc sach
tuc va » truc va, tuc xa, duc va
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (te sach)) thi hanh xa hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh lam chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) thi hanh xa hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh lam chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) thi hanh xa hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh lam chat triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) thi hanh xa hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh lam chat triet*.