Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » thong cong, hang cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
trang va » tran van, hang va
dan than » dan chan, ban than, van than

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 xanh - hanh trang va ((nhung cong) OR (dung cong)) ((manh toan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trang va ((nhung cong) OR (dung cong)) ((manh toan) OR (dan than)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh trang va ((nhung cong) OR (dung cong)) ((manh toan) or (dan than)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trang va ((nhung cong) OR (dung cong)) ((manh toan) or (dan than)) ban*.