Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, dinh lam
thi hanh » thi thanh
cham tuc » nham thuc, pham thuc, tham thuc
hanh va » hang va, hanh vi
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
hanh vu » hanh vi, hanh tu, hanh ve
te sach » toc sach
ve cham » va cham, ve chat, vu cham
vu hoi » vu khoi, va hoi, vu hai
tuc va » thuc va, truc va, tuc xa

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 vu hoi. hieu ve cham tuc va ((hanh lam) or (hanh va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) thi hanh vu hoi. hieu ve cham tuc va ((hanh lam) OR (hanh va)) va triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) thi hanh vu hoi. hieu ve cham tuc va ((hanh lam) or (hanh va)) va triet*.