Perhaps you should try some spelling variations:
trinh hanh » trinh thanh, trinh anh, trinh hinh
thi chieu » thi chien, thi hieu, theo chieu
trinh han » trinh quan
dang cong » dung cong
theo chu » theo chieu, cho chu, chao chu
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi chieu) or (theo chu)) tach - hanh ((trinh hanh) or (trinh han)) dang cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo chu)) tach - hanh ((trinh hanh) OR (trinh han)) dang cong van toan cao.
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo chu)) tach - hanh ((trinh hanh) or (trinh han)) dang cong van toan cao*.