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
tap toan » tap doan, tap quan, bai toan
tam toan » tam than, pham toan, tam thanh

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