Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. ((hieu vu) OR (hieu va)) cham duc van hanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu nang x hoi. ((hieu vu) OR (hieu va)) cham duc van hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach tu nang x hoi. ((hieu vu) OR (hieu va)) cham duc van hanh dai cua triet*.