Perhaps you should try some spelling variations:
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
tang vat » tang van, dang vat, bang vat
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (toc thieu)) xanh - hanh tang vat dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (toc thieu)) xanh - hanh tang vat dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (toc thieu)) xanh - hanh tang vat dung cong dan toan cao*.