Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 tran quang ((nhung cong) OR (dung cong)) tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh tran quang ((nhung cong) OR (dung cong)) tac toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tran quang ((nhung cong) OR (dung cong)) tac toan cao*.