Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tan toan » tan tran, dan toan, tam toan
van toan » van tuan, van tan, van thanh
tap toan » tap doan, tap quan, bai 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 cua nhung cong ((((tan toan) OR (van toan))) or (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh cua nhung cong ((((tan toan) OR (van toan))) OR (tap toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh tranh cua nhung cong ((((tan toan) OR (van toan))) or (tap toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh cua nhung cong ((((tan toan) OR (van toan))) or (tap toan)) ban*.