Perhaps you should try some spelling variations:
nguyen le » nguyen ly, nguyen _, nguyen tu
luyen dun » tuyen dung, luyen xuan, luyen de
app tren » lap tren, lop tren, tap tren
dun nang » dung nang, den nang, luan nang
nang mem » nang ma
kip tren » kip ren, kin tren, gi tren
le nang » le tang, le dang, ke nang
bo bi » bao bi, bo bai, bot bi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( bo bi ((kip tren) OR (app tren)) luyen dun nang mem. Đo ((tuoi 7) OR (tuoi 1))-15 ) OR ( bo bi ((kip tren) OR (app tren)) nguyen le nang mem. Đo ((tuoi 7) OR (tuoi 1))-15 ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( bo bi ((kip tren) OR (app tren)) luyen dun nang mem. Đo ((tuoi 7) or (tuoi 1))-15 ) or ( bo bi ((kip tren) OR (app tren)) nguyen le nang mem. Đo ((tuoi 7) or (tuoi 1))-15 ))~".
• Adding a wildcard symbol may retrieve word variants: (( bo bi ((kip tren) OR (app tren)) luyen dun nang mem. Đo ((tuoi 7) or (tuoi 1))-15 ) or ( bo bi ((kip tren) OR (app tren)) nguyen le nang mem. Đo ((tuoi 7) or (tuoi 1))-15 ))*.