Perhaps you should try some spelling variations:
tuyen tai » truyen tai, tuyen tap, nguyen tai
cong cong » cong dong, trong cong, dung cong
xuyen tai » xuyen tac, nguyen tai, truyen tai
cac thoi » cac toi, cac hop, cac tro
cac thu » cach thuc
ban ke » ban kem, ban ve, ban le
y thi » ky thi, ly thi, _ thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tuyen tai) or (xuyen tai)) ((cac thu) or (cac thoi)) đe co ban ke ((y thi) OR (y thai)) cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tuyen tai) OR (xuyen tai)) ((cac thu) OR (cac thoi)) đe co ban ke ((y thi) OR (y thai)) cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tuyen tai) or (xuyen tai)) ((cac thu) or (cac thoi)) đe co ban ke ((y thi) OR (y thai)) cong cong".
• Adding a wildcard symbol may retrieve word variants: ((tuyen tai) or (xuyen tai)) ((cac thu) or (cac thoi)) đe co ban ke ((y thi) OR (y thai)) cong cong*.