Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
canh thanh » canh tranh, danh thanh, anh thanh
doc chieu » doc hieu, doi chieu, toc thieu
thanh qua » thanh quan, thanh qui, hanh qua
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh

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 tinh - canh thanh qua dung cong tan ((thanh san) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc chieu tinh - canh thanh qua dung cong tan ((thanh san) OR (phan tu))".
• Adding a wildcard symbol may retrieve word variants: doc chieu tinh - canh thanh qua dung cong tan ((thanh san) OR (phan tu))*.