Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach thi » sach thu, sach tai, sach thieu
thanh va » thanh van, hanh va, thanh ha
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, ve cai
va hoi » xa hoi, va hoc, va hoa
va cam » va cham, va cac, va cao

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