Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh tang » hanh trang, anh tang, hanh mang
dung song » dung cong, dung dong, vung song
xanh tuan » anh tuan, thanh tuan, van tuan
manh tuan » anh tuan, manh toan, minh tuan
ho chieu » theo chieu, hoc thieu, mot chieu
tang ap » tang van, tang tai, tang dan
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: ((doi chieu) OR (ho chieu)) xanh - hanh tang ap dung song ((xanh tuan) OR (manh tuan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - hanh tang ap dung song ((xanh tuan) OR (manh tuan)) tap~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - hanh tang ap dung song ((xanh tuan) OR (manh tuan)) tap*.