Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
sach thi » sach tai, sach thieu, sach tham
sach thu » sach thue, sach thieu, sach tham
hanh xa » hanh va, hanh ma, hanh xu
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
xa hanh » xa thanh, xa khanh, va hanh
lai cua » dai cua, hai cua, lai chau
cac tuc » cac tu, cac tac, cac nuoc

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

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