Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
thai va » thai van
su sach » so sach, vu sach
xuc va » duc va, tuc va, luc va
tai va » mai va, tri va, dai va

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 dang xay hoi. ((hieu ve) or (hieu van)) cham xuc va van ((tai va) OR (thai va)) thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xay hoi. ((hieu ve) OR (hieu van)) cham xuc va van ((tai va) OR (thai va)) thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xay hoi. ((hieu ve) or (hieu van)) cham xuc va van ((tai va) OR (thai va)) thieu".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xay hoi. ((hieu ve) or (hieu van)) cham xuc va van ((tai va) OR (thai va)) thieu*.