Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
va trien » va truyen, va thiet, va tuyen
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
xuc van » duc van, luc van, vuc van
van anh » van thanh, tuan anh, van minh
anh kem » hanh kem, anh kiem, banh kem
ve cam » ve cham, ve cac, va cam
kem va » kiem va, kiem van
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang x hoi. hieu ((ve cam) or (vien cac)) xuc van anh kem va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cam) OR (vien cac)) xuc van anh kem va trien.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cam) or (vien cac)) xuc van anh kem va trien*.