Perhaps you should try some spelling variations:
nhan tai » hang tai, van tai, toan tai
van nhan » van phan, van thanh, danh nhan
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xuc van » duc van, luc van, vuc van
va cham » va chat, va tham
vu kham » vu khanh
vu cham » tu cham, qua cham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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 ((((vu cham) OR (vu kham))) or (va cham)) xuc van nhan tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu ((((vu cham) OR (vu kham))) OR (va cham)) xuc van nhan tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. hieu ((((vu cham) OR (vu kham))) or (va cham)) xuc van nhan tai va thiet".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu ((((vu cham) OR (vu kham))) or (va cham)) xuc van nhan tai va thiet*.