Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh
chieu sang » chieu sach, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
trinh han » trinh quan
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
han va » hang va, hanh va, nhan va

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 (hieu manh))) or (chieu sang)) - trinh han va nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu xanh) OR (hieu manh))) OR (chieu sang)) - trinh han va nhung cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu xanh) or (hieu manh))) or (chieu sang)) - trinh han va nhung cong san toan cao*.