Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
sinh trong » sinh truong, sinh trung, dinh trong
dien xuong » tien luong
doi chieu » doc hieu, doi chi, mot chieu
tan khoan » toan khoan, tai khoan, tao khoang
khoan cap » khoan cam, khan cap, khoa cap
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - sinh trong ((dien xuong) or (dieu duong)) cong tan khoan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - sinh trong ((dien xuong) OR (dieu duong)) cong tan khoan cap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - sinh trong ((dien xuong) or (dieu duong)) cong tan khoan cap*.