Perhaps you should try some spelling variations:
hoc thieu » toc thieu
hanh tang » hanh trang, hanh mang, hanh tung
hang cong » dang cong, hang nong, bang cong
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) OR (hoc hien)) khang - ((hanh tang) or (anh tang)) va hang cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) khang - ((hanh tang) OR (anh tang)) va hang cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (hoc hien)) khang - ((hanh tang) or (anh tang)) va hang cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (hoc hien)) khang - ((hanh tang) or (anh tang)) va hang cong tac toan cao*.