Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cap duong » cau duong, cac duong, cap dung
ho chieu » theo chieu, doi chieu, mot chieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
ap dung » xay dung, van dung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - thanh tung ((cap duong) OR (ap dung)) cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - thanh tung ((cap duong) or (ap dung)) cong san toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - thanh tung ((cap duong) or (ap dung)) cong san toan ban*.