Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
nang thuc » dang thuoc, nhanh thuc, trang thuc
dung cong » dung trong
ngang van » ngan van, nang van, hoang van
nang dua » nang du, nang suat, nang quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tinh - anh ((nang dua) or (nang thuc)) dung cong ngang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - anh ((nang dua) OR (nang thuc)) dung cong ngang van ban*.