Perhaps you should try some spelling variations:
truyen tai » truyen dai, truyen bai, truyen tam
tuyen tai » tuyen tap, xuyen tai, nguyen tai
cong cong » cong dong, dung cong, dang cong
cac khu » cac thu, cac khoi, cac kieu
ky thua » ky thuat, ky thu, kxy thuat
ban ve » ban va
ve ky » va ky, ke ky

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 (truyen tai)) cac khu đe co ban ve ky thua ((cong cong) OR (trong cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tuyen tai) OR (truyen tai)) cac khu đe co ban ve ky thua ((cong cong) OR (trong cong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tuyen tai) or (truyen tai)) cac khu đe co ban ve ky thua ((cong cong) OR (trong cong))".
• Adding a wildcard symbol may retrieve word variants: ((tuyen tai) or (truyen tai)) cac khu đe co ban ve ky thua ((cong cong) OR (trong cong))*.