Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, nhung don
doi chieu » doc hieu, doi chi, ho chieu
tranh van » tran van, trinh van, thanh van
hang cong » dang cong, hang nong, bang cong
tren tap » tren tau, tieng tap, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - canh tranh van ((nhung cong) or (hang cong)) tac ((tren tap) OR (tuyen tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - canh tranh van ((nhung cong) OR (hang cong)) tac ((tren tap) OR (tuyen tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - canh tranh van ((nhung cong) or (hang cong)) tac ((tren tap) OR (tuyen tap))".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - canh tranh van ((nhung cong) or (hang cong)) tac ((tren tap) OR (tuyen tap))*.