Perhaps you should try some spelling variations:
canh tran » canh tranh, hanh trang, banh trang
chi xanh » chi anh, chi danh, chi hanh
tran van » luan van
van dung » van dong, xay dung, tin dung
dong von » dung von, dong hoc, dong hoa
doi chi » doi khi
tan tap » toan tap, tan tat, man tap
han tap » han tai, toan tap, nhan tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh tran van dung ((dong von) OR (dong co)) ((tan tap) OR (han tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - canh tran van dung ((dong von) or (dong co)) ((tan tap) OR (han tap))~".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh tran van dung ((dong von) or (dong co)) ((tan tap) OR (han tap))*.