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