Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
thi hang » thi nang, thi hong, thi thanh
thi hanh » thi thanh
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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