Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
luong cong » dung cong, trong cong, cong cong
hoc thieu » toc thieu, hoc hien
dong cong » duong cong, dung cong, dang cong
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 trinh quan ((dong cong) or (luong cong)) tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - hanh trinh quan ((dong cong) OR (luong cong)) tap toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - hanh trinh quan ((dong cong) or (luong cong)) tap toan cao*.