Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cdoanh van » doan van, doanh va, doanh ban
doanh van » doan van, doanh va, doanh ban
cua thong » cua thuong, cua khong, cua tong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
hieu ca » hieu cac, hieu cua, hieu va
can van » cac van, can ban, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu ca - ((((cdoanh van) or (can van))) or (doanh van)) cua thong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu ca - ((((cdoanh van) OR (can van))) OR (doanh van)) cua thong cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu ca - ((((cdoanh van) or (can van))) or (doanh van)) cua thong cong tan toan cao*.