Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam tu
thi hang » thi nang, thi hong, thi thanh
hanh vai » hanh vi, hanh va, hanh tai
thi hanh » thi thanh
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, xa khanh, va hanh
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua

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

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