Perhaps you should try some spelling variations:
nen cong » neon cong, nien cong, nen mong
len cong » den cong, len con, lieu cong
cac chu » cac che, cac khu, ca chu
le cong » te cong, ve cong, le cung
cac thu » cach thuc, cac thoi
ban ve » ban va
ve ky » va ky, ke ky
tuyen » truyen, quyen

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

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