Perhaps you should try some spelling variations:
thanh viec » thanh vien, thanh liem, thanh nien
van thanh » ban thanh, van tuan
sang kyo » sang tao, dang ky, sang cho
kham vuc » kham cuoc, khu vuc
pham vu » pham tu, pham va, pham vi
hieu vu » hieu va, hieu ve, hieu su
sang ky » dang ky, tang ky, bang ky
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
ma noi » ha noi, ma moi, va noi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sang ky) or (sang kyo)) tang ma noi. hieu vu ((kham vuc) OR (pham vu)) van thanh viec cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sang ky) OR (sang kyo)) tang ma noi. hieu vu ((kham vuc) OR (pham vu)) van thanh viec cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sang ky) or (sang kyo)) tang ma noi. hieu vu ((kham vuc) OR (pham vu)) van thanh viec cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sang ky) or (sang kyo)) tang ma noi. hieu vu ((kham vuc) OR (pham vu)) van thanh viec cua tre*.