Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
luan nhung » luan chung, luan hung, luan phuong
quan nhung » qua nhung, cua nhung, luan chung
tinh tang » tinh trang, tinh sang, tinh bang
cong tan » cong tac, cong san, cong thanh
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: theo ((chieu xanh) or (chieu sach)) - tinh tang ((luan nhung) OR (quan nhung)) cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - tinh tang ((luan nhung) OR (quan nhung)) cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sach)) - tinh tang ((luan nhung) OR (quan nhung)) cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sach)) - tinh tang ((luan nhung) OR (quan nhung)) cong tan toan cao*.