Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhieu tang » hieu lang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh quan, trinh luan
cong san » cong tac
san toan » van toan, dan toan, manh 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: hoc ((chieu sang) or (nhieu tang)) - hanh ((trinh cua) OR (trinh luat)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (nhieu tang)) - hanh ((trinh cua) OR (trinh luat)) nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (nhieu tang)) - hanh ((trinh cua) OR (trinh luat)) nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (nhieu tang)) - hanh ((trinh cua) OR (trinh luat)) nhung cong san toan cao*.