Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
quan trong » gian trong
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang quan » tang luan, nang quan, tong quan
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham 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 - hanh tang quan trong cong ((tac toan) OR (tam toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh tang quan trong cong ((tac toan) OR (tam toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tang quan trong cong ((tac toan) OR (tam toan)) cau*.