Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tai hanh » tai thanh, tai nhanh, thi hanh
hanh vai » hanh vi, hanh va, hanh tai
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
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
vai cua » dai cua, hai cua, lai cua
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: ((toc sach) OR (doc sach)) tai hanh xa hoi. hieu va ((cac tuc) or (cac toc)) xa hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) tai hanh xa hoi. hieu va ((cac tuc) OR (cac toc)) xa hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) tai hanh xa hoi. hieu va ((cac tuc) or (cac toc)) xa hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) tai hanh xa hoi. hieu va ((cac tuc) or (cac toc)) xa hanh vai cua triet*.