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
chat hoc » chat hoa, chat thom, cho hoc
vuc nang » cuc nang, vu nang, chuc nang
va danh » va dinh, va dan, va hanh
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
v nang » va nang, vu nang, van nang
cuc te » cua te, cuc thue, cuc tieu

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) or (vuc nang)) xa hoi. hieu va chat hoc 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) OR (vuc nang)) xa hoi. hieu va chat hoc 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) or (vuc nang)) xa hoi. hieu va chat hoc va danh dien cuc te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) ((v nang) or (vuc nang)) xa hoi. hieu va chat hoc va danh dien cuc te*.