Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu sang » chieu sang, tieu dung, tiem nang
dung cong » dung trong
tung vap » tung va, trung van, tuong vao
vap dung » van dung, ap dung, va dung
cong van » cong vang, cong san, song van
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 tieu sang - thanh tung vap dung cong van ((tan tap) OR (tan tat))~.
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - thanh tung vap dung cong van ((tan tap) or (tan tat))*.