Perhaps you should try some spelling variations:
van phan » van phong, van thanh, luan phan
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
vu cham » va cham, vu kham, tu cham
ve chat » va chat, van chat
y nang » ky nang, ly nang, v nang
va han » va phan, van han, va hanh
tai va » thai va, mai va, tri va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu ((vu cham) or (ve chat)) xuc ((va han) or (van phan)) tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ((vu cham) OR (ve chat)) xuc ((va han) OR (van phan)) tai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((vu cham) or (ve chat)) xuc ((va han) or (van phan)) tai va thiet*.