Perhaps you should try some spelling variations:
tren luyen » ren luyen, trinh luyen, tien quyen
luyen dun » tuyen dung, luyen xuan, luyen de
kip tren » kip ren, kin tren, app tren
dun nang » dung nang, den nang, luan nang
nang mem » nang ma
bai kip » bi kip, bai kinh
ke nang » ki nang, ke mang, kha nang
bo bai » bo tai, bo ba, bo cai
tuoi 7 » tuoi 1

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( bo bai kip tren luyen dun nang mem. Đo tuoi 7-15 ) or ( bo bai kip tren luyen ((ke nang) OR (ky nang)) mem. Đo tuoi 7-15 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( bo bai kip tren luyen dun nang mem. Đo tuoi 7-15 ) OR ( bo bai kip tren luyen ((ke nang) OR (ky nang)) mem. Đo tuoi 7-15 )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( bo bai kip tren luyen dun nang mem. Đo tuoi 7-15 ) or ( bo bai kip tren luyen ((ke nang) OR (ky nang)) mem. Đo tuoi 7-15 ))".
• Adding a wildcard symbol may retrieve word variants: (( bo bai kip tren luyen dun nang mem. Đo tuoi 7-15 ) or ( bo bai kip tren luyen ((ke nang) OR (ky nang)) mem. Đo tuoi 7-15 ))*.