Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thi hanh » thi thanh
hanh dai » hanh tai, hanh dao, vanh dai
hoc sach » hoc sinh, hoc anh
hanh xa » hanh va, hanh ma, hanh xu
hoc cac » hoc cao
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
xa hanh » xa thanh, xa khanh, va hanh

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