Perhaps you should try some spelling variations:
hoc dang » hoc dan, hoc dung, hoc bang
hanh vai » hanh vi, hanh va, hanh tai
dang thi » hoang thi, dang khoi
va triet » va thiet, va trien, ve triet
thi hanh » thi thanh
hieu va » hieu qua
hanh ca » hanh cac, hanh cat, hanh cua
cac toc » cac toi, cac nuoc, cac thoi
xa hanh » xa thanh, xa khanh, va hanh
cac tuc » cac tu, cac tac, cac nuoc
ca hoi » cau hoi, cua hoi, xa hoi
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dang thi hanh ca hoi. ((hieu va) or (lieu va)) ((cac tuc) or (cac toc)) xa hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dang thi hanh ca hoi. ((hieu va) OR (lieu va)) ((cac tuc) OR (cac toc)) xa hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: hoc dang thi hanh ca hoi. ((hieu va) or (lieu va)) ((cac tuc) or (cac toc)) xa hanh vai va triet*.