Perhaps you should try some spelling variations:
phan tai » pham tai, nhan tai, phan thi
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, vu cham
va tham » van tham, va cham, va thanh
va phan » van phan, va phat, va phap
xuc va » duc va, tuc va, luc va
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 ty nang xa hoi. hieu ((ve cham) or (va tham)) xuc va phan tai 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 (va tham)) xuc va phan tai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((ve cham) or (va tham)) xuc va phan tai va thiet*.