Perhaps you should try some spelling variations:
tren luyen » trinh luyen, tien quyen, tre tuyen
kip tren » kin tren, app tren, gi tren
luyen ky » truyen ky, luyen de
nang mem » nang ma
bai kip » bi kip, bai kinh
bo bai » bo tai, bo ba, co bai
tuoi 7 » tuoi 1
bo cai » bo tai, bo cau, bo cam

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 ky nang mem. Đo tuoi 7-15 ) or ( bo cai kip ren luyen 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 ky nang mem. Đo tuoi 7-15 ) OR ( bo cai kip ren luyen ky nang mem. Đo tuoi 7-15 )).
• Adding a wildcard symbol may retrieve word variants: (( bo bai kip tren luyen ky nang mem. Đo tuoi 7-15 ) or ( bo cai kip ren luyen ky nang mem. Đo tuoi 7-15 ))*.