Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua thong » cua thuong, cua khong, cua tong
sinh cua » manh cua, dinh cuu, sinh va
cong san » cong tac
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: hoc ((chieu xanh) OR (chieu sang)) - hanh sinh cua thong ((cong ty) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - hanh sinh cua thong ((cong ty) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sang)) - hanh sinh cua thong ((cong ty) or (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sang)) - hanh sinh cua thong ((cong ty) or (cong san)) toan cao*.