Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
cham duc » pham duc, cham soc, pham duy
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
tu nong » tu dong, tu cong, tu tong
tu nang » tru nang, tu nano, tu lang
vu cham » va cham, vu kham, tu cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tu nang) OR (tu nong)) xa hoi. hieu vu cham duc va hanh de ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nong)) xa hoi. hieu vu cham duc va hanh de ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) OR (tu nong)) xa hoi. hieu vu cham duc va hanh de ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) OR (tu nong)) xa hoi. hieu vu cham duc va hanh de ((cua triet) or (su triet))*.