Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
dung cong » dung trong
cong van » cong vang, cong san, song van
tung ap » tang ap, tung dan, tung bay
ap dung » xay dung, van dung
tan tap » toan tap, han tap, man tap
tan tat » ban tat, toan tap, toan tai

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: theo chieu xanh - thanh tung ap dung cong van ((tan tap) OR (tan tat))~.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh tung ap dung cong van ((tan tap) or (tan tat))*.