Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh luong » hang luong, thanh huong, thanh cuong
luong quan » thong quan, duong qua
quan trong » gian trong
hoc thieu » toc thieu, hoc hien
pham toan » pham tuan, pham tan, pham tran
phap toan » phap hoan, phap luan, phap phan

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 - hanh luong quan trong cong ((pham toan) OR (phap toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh luong quan trong cong ((pham toan) OR (phap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh luong quan trong cong ((pham toan) OR (phap toan)) cau*.