Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
tu nong » tu cong, tu tong, tu tuong
qua cao » qua cac, qua ca, qua cai
cao tuc » dao tuc, cao duc, cao suc
xa hanh » xa thanh, xa khanh, va hanh
vai cua » dai cua, hai cua, lai cua

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) or (toc sach)) ((tu nong) or (tu dong)) xa hoi. hieu qua cao tuc xa hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((tu nong) OR (tu dong)) xa hoi. hieu qua cao tuc xa hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ((tu nong) or (tu dong)) xa hoi. hieu qua cao tuc xa hanh vai cua triet*.