Perhaps you should try some spelling variations:
bang cong » dang cong, bang song, hang cong
hien anh » hien hanh, thien anh, tien anh
dien anh » tieng anh, dien dan
tranh va » tranh van, trang va, trinh va
san chan » san chang, san chay, ban chan
dan chan » dan gian, dan ca, van chat
va bang » va nang, va lang, va ban

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

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