Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, qua cua
so sach » so sanh, bo sach, co sach
duc van » duc va, duc tan, duc manh
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
ve cham » ve chat, vu cham, ve chim
han tai » hang tai, nhan tai, van tai
sach ty » sach y, sach tu, sach thu
van han » van hanh, van phan, van nhan
va cham » va chat, va tham
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: so sach ty nang xa hoi. hieu ((((ve cham) or (qua cham))) or (va cham)) duc van han tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu ((((ve cham) OR (qua cham))) OR (va cham)) duc van han tai va thiet.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu ((((ve cham) or (qua cham))) or (va cham)) duc van han tai va thiet*.