Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh thanh » canh tranh, danh thanh, anh thanh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
thanh van » thanh san, thanh toan, thanh phan
van nhung » van nhuong, va nhung, van hung
tap doan » tap quan
bai toan » bai tap
van tan » van tuan, van ban, van tai

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 xanh - canh thanh van nhung cong ((((tap doan) or (bai toan))) or (van tan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh thanh van nhung cong ((((tap doan) OR (bai toan))) OR (van tan)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh thanh van nhung cong ((((tap doan) or (bai toan))) or (van tan)) ban*.