Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
cong tran » cong tan, cong tuan, cong toan
hoc dien » hoc hien, hoc vien, hoc dieu
dien anh » tieng anh, dien dan
van dung » van dong, xay dung, tin dung
van chat » cao chat
va dung » va duong, vat dung, va ung
van cau » van dau, van hau, toan cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dien anh - canh trinh ((va dung) OR (van dung)) cong tran ((van cau) or (van chat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dien anh - canh trinh ((va dung) OR (van dung)) cong tran ((van cau) OR (van chat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dien anh - canh trinh ((va dung) OR (van dung)) cong tran ((van cau) or (van chat))".
• Adding a wildcard symbol may retrieve word variants: hoc dien anh - canh trinh ((va dung) OR (van dung)) cong tran ((van cau) or (van chat))*.