Perhaps you should try some spelling variations:
van thai » van thoai, van tai, van hai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
thai va » thai van
luc va » duc va, tuc va, loc 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 ty nang xa hoi. hieu ((ve cham) or (vu cham)) luc va van thai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve cham) OR (vu cham)) luc va van thai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((ve cham) or (vu cham)) luc va van thai va thiet*.