Perhaps you should try some spelling variations:
tang luan » dung luan
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
cong ran » cong san, cong tan, cong dan
ran tren » tran tren, van tren, dan tren
tren ca » tren cay, tren co, tren c

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (ho chieu)) xanh - hanh ((tang luan) or (manh cua)) dung cong ran tren ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (ho chieu)) xanh - hanh ((tang luan) OR (manh cua)) dung cong ran tren ca.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (ho chieu)) xanh - hanh ((tang luan) or (manh cua)) dung cong ran tren ca*.