Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doan tien » doan thien, doanh tien, toan tien
trinh hoa » trinh do, trinh han
trinh he » trinh han, trinh thi, trinh ky
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doan tien thinh - hanh ((trinh he) or (trinh hoa)) nhung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doan tien thinh - hanh ((trinh he) OR (trinh hoa)) nhung cong san toan ban*.