Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
thang va » hang va, trang va, thong va
cong tac » cong ty
toan cao » toan ban
toan tap » toan ban
tang va » trang va, tang van, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - hanh ((tang va) OR (thang va)) nhung cong tac ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((tang va) OR (thang va)) nhung cong tac ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - hanh ((tang va) OR (thang va)) nhung cong tac ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((tang va) OR (thang va)) nhung cong tac ((toan cao) or (toan tap))*.