Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
hanh hai » thanh hai, nhanh hai, hang hai
cac thoi » cac toi, cac hop, cac tro
toc sach » doc sach, thuoc sach, nuoc sach
thi hanh » thi thanh
hoc sach » hoc sinh, hoc cac, hoc anh
hanh ca » hanh cac, hanh cat, hanh cua
cac tuc » cac toc, cac tu, cac tac
xa hanh » xa thanh, xa khanh, va hanh
hai van » thai van, ha van, hai tan
hieu va » lieu va, hieu qua
ca hoi » cau hoi, cua hoi, xa hoi

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 (hoc sach)) thi hanh ca hoi. hieu va ((cac tuc) or (cac thoi)) xa hanh hai van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) thi hanh ca hoi. hieu va ((cac tuc) OR (cac thoi)) xa hanh hai van triet.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) thi hanh ca hoi. hieu va ((cac tuc) or (cac thoi)) xa hanh hai van triet*.