Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
tranh viet » tran viet, trinh viet, trang viet
viet chung » viet hung, viet phuong, viet thuong
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
cong tan » cong tac, cong san, cong thanh
phan lap » phan dau

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 - canh tranh viet chung ((cong tan) or (cong vang)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - canh tranh viet chung ((cong tan) OR (cong vang)) phan lap*.