Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
can tranh » tan tran, van ranh, co tranh
hoc nhung » hoa nhung, hon nhung, nuoc nhung
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, manh toan

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 tranh) or (can tranh)) hoc nhung cong ((van toan) OR (van thanh)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh tranh) OR (can tranh)) hoc nhung cong ((van toan) OR (van thanh)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh tranh) or (can tranh)) hoc nhung cong ((van toan) OR (van thanh)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh tranh) or (can tranh)) hoc nhung cong ((van toan) OR (van thanh)) tap*.