Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong doan » cong dan, cong hoan, dong doanh
doan phan » doanh phan, toan phan, dan phan
hoc dieu » hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
va huong » va thuong, va phuong, va tuong
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc dieu) or (ho chieu)) xanh - thanh trung ((va dung) or (va huong)) cong doan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (ho chieu)) xanh - thanh trung ((va dung) OR (va huong)) cong doan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((hoc dieu) or (ho chieu)) xanh - thanh trung ((va dung) or (va huong)) cong doan phan tu*.