Perhaps you should try some spelling variations:
nang quan » ban quan, nang suat
quan dung » quang dung, quan duong, qua dung
ho chieu » theo chieu, hoc thieu, doi chieu
anh nang » ganh nang, anh bang, anh dang
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cau » 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: ((ho chieu) or (toc thieu)) sach - anh nang quan dung ((cong tap) OR (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) sach - anh nang quan dung ((cong tap) OR (cong tac)) toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (toc thieu)) sach - anh nang quan dung ((cong tap) OR (cong tac)) toan cau*".