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

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 (dang thuoc)) dung cong ngang toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - anh ((nang dua) OR (dang thuoc)) dung cong ngang toan ban*.