Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
dan toan » van toan, dan than, manh toan
dan chan » dan gian, dan ca, van chat
tung ap » tang ap, tung dan, tung bay
ap dung » xay dung, van dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc thieu)) xanh - thanh tung ap dung cong ((dan toan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) xanh - thanh tung ap dung cong ((dan toan) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) xanh - thanh tung ap dung cong ((dan toan) or (dan chan)) cau*.