Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh trung » thanh trung, manh trung, danh trung
hanh trang » thanh trung, canh tranh, hanh trinh
cong thanh » dong thanh, cong trinh, truong thanh
doc nhieu » doc hieu, toc thieu, hoc thieu
cong tan » cong tac, cong san, cong ty
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: doc nhieu tang - ((hanh trung) OR (hanh trang)) va nhung ((cong tan) or (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc nhieu tang - ((hanh trung) OR (hanh trang)) va nhung ((cong tan) OR (cong thanh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc nhieu tang - ((hanh trung) OR (hanh trang)) va nhung ((cong tan) or (cong thanh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: doc nhieu tang - ((hanh trung) OR (hanh trang)) va nhung ((cong tan) or (cong thanh)) toan cao*.