Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
toc sach » hoc sach, thuoc sach, nuoc sach
dien cuc » dien tu, dieu cua, vien cac
doc sach » hoc sach, nuoc sach, dac sac
va danh » va dinh, va dan, va hanh
hieu va » hieu qua
soc va » hoc va, loc va, doc va
v nang » va nang, vu nang, van nang
cuc te » cua te, cuc thue, cuc tieu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (doc sach)) v nang x hoi. ((hieu va) or (lieu va)) cham soc va danh dien cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) v nang x hoi. ((hieu va) OR (lieu va)) cham soc va danh dien cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) v nang x hoi. ((hieu va) or (lieu va)) cham soc va danh dien cuc te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) v nang x hoi. ((hieu va) or (lieu va)) cham soc va danh dien cuc te*.