Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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: hoc thieu khang - ((hanh tang) or (hanh mang)) va nhung cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - ((hanh tang) OR (hanh mang)) va nhung cong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - ((hanh tang) or (hanh mang)) va nhung cong tap toan cao*.