Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
thi nang » thi cong, ki nang, thi hanh
cham tuc » nham thuc, pham thuc, tham thuc
ve cham » va cham, ve chat, vu cham
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, 5 hoi

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 (su sach)) thi nang ((x hoi) OR (x ho)). hieu ve cham tuc va hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) thi nang ((x hoi) OR (x ho)). hieu ve cham tuc va hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) thi nang ((x hoi) OR (x ho)). hieu ve cham tuc va hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) thi nang ((x hoi) OR (x ho)). hieu ve cham tuc va hanh lai cua triet*.