Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
can thuc » dan thuc, van thuc, cay thuc
thu hang » thi hang, thuc hanh, thu huong
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
vu sach » vu bach, su sach, vu khach
van can » van canh, van ban, ban can
va hoc » van hoc
va hoi » xa hoi, va hoa

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

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