Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
pham duy » pham duc
thu tang » thu trang, thu thang, thu hang
hanh lam » thanh lap, hanh kem, hanh va
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
hieu su » hieu sau, tieu su, hieu so
su pham » san pham
duy va » duy vat, duy van, day va
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu tang ((ma hoi) or (xa hoi)). hieu su pham duy va hanh lam ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu tang ((ma hoi) OR (xa hoi)). hieu su pham duy va hanh lam ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu tang ((ma hoi) or (xa hoi)). hieu su pham duy va hanh lam ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: so sach thu tang ((ma hoi) or (xa hoi)). hieu su pham duy va hanh lam ((cua triet) OR (su triet))*.