Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
dang trung » dung trung, dong trung, quang trung
hanh trinh » canh tranh, hanh chinh
duong cong » luong cong, duong trong, trong cong
hoc thieu » toc thieu, hoc hien
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 - ((dang trung) or (hanh trinh)) dap ((duong cong) or (dung cong)) tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((dang trung) OR (hanh trinh)) dap ((duong cong) OR (dung cong)) tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((dang trung) or (hanh trinh)) dap ((duong cong) or (dung cong)) tac toan cao*.