Perhaps you should try some spelling variations:
duong truong » duong trong, truong trung, tang truong
xuan truong » xa truong
hanh trung » thanh trung, hanh trang, manh trung
hoc thieu » toc thieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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) or (hoc hien)) tinh - hanh trung ((xuan truong) OR (duong truong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) tinh - hanh trung ((xuan truong) OR (duong truong)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) tinh - hanh trung ((xuan truong) OR (duong truong)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) tinh - hanh trung ((xuan truong) OR (duong truong)) cong tac toan cau*.