Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hang » van hang, va nang, va lang
xuc va » duc va, tuc va, luc va
tai va » thai va, tri va, dai 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 ky nang xa hoi. hieu van cham xuc va hang ((tai va) OR (mai va)) thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van cham xuc va hang ((tai va) OR (mai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu van cham xuc va hang ((tai va) OR (mai va)) thiet*.