Perhaps you should try some spelling variations:
trinh hanh » trinh thanh, trinh anh, trinh hinh
nhung cong » dung cong, thong cong, hang cong
trinh han » trinh quan
manh toan » thanh toan, anh tuan, tinh toan
theo chu » theo chieu, cho chu, chao chu
chu tach » chu tich, chu thich, chu thanh
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu tach - hanh ((trinh hanh) OR (trinh han)) nhung cong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu tach - hanh ((trinh hanh) OR (trinh han)) nhung cong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu tach - hanh ((trinh hanh) OR (trinh han)) nhung cong ((dan toan) or (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo chu tach - hanh ((trinh hanh) OR (trinh han)) nhung cong ((dan toan) or (manh toan)) cao*.