Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
va phan » van phan, va phat, va phap
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
va han » van han, va hanh, va 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: ((tu sach) or (su sach)) ky nang xa hoi. hieu van cham xuc ((va han) OR (va phan)) tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu van cham xuc ((va han) OR (va phan)) tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. hieu van cham xuc ((va han) OR (va phan)) tai va thiet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu van cham xuc ((va han) OR (va phan)) tai va thiet*.