Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
cuong dung » tuong duong, ung dung, thong dung
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan tap » toan 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 - ((trinh cong) or (trinh dung)) cuong dung cong bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - ((trinh cong) OR (trinh dung)) cuong dung cong bai toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - ((trinh cong) or (trinh dung)) cuong dung cong bai toan tap*.