Perhaps you should try some spelling variations:
doc chieu » doc hieu, doi chieu, toc thieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
chat dung » chan dung, hat dung, chat luong
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc chieu) or (doi chi)) tinh - hanh tinh chat dung cong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc chieu) OR (doi chi)) tinh - hanh tinh chat dung cong dan phan tu*.