Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » hanh trinh, hanh trang, lanh tranh
phung cong » phong cong, nhung chong, dung cong
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
tan toan » tan tran, tap toan, van 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: ho chieu sang - ((hanh tranh) OR (canh tranh)) thu ((phung cong) or (nhung cong)) tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((hanh tranh) OR (canh tranh)) thu ((phung cong) OR (nhung cong)) tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((hanh tranh) OR (canh tranh)) thu ((phung cong) or (nhung cong)) tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((hanh tranh) OR (canh tranh)) thu ((phung cong) or (nhung cong)) tan toan cao*.