Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
trinh vat » trinh van, trinh luat, trinh han
cong tan » cong tac, cong san, cong thanh
tan can » toan can, tan van, ban can
can cau » van cau, ban cau, ca cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: he ((nhieu tang) OR (hieu lang)) - canh ((trinh vat) or (sinh vat)) nhung cong tan can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he ((nhieu tang) OR (hieu lang)) - canh ((trinh vat) OR (sinh vat)) nhung cong tan can cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "he ((nhieu tang) OR (hieu lang)) - canh ((trinh vat) or (sinh vat)) nhung cong tan can cau".
• Adding a wildcard symbol may retrieve word variants: he ((nhieu tang) OR (hieu lang)) - canh ((trinh vat) or (sinh vat)) nhung cong tan can cau*.