Perhaps you should try some spelling variations:
hanh dien » nhanh dien, hang dien, danh dien
toc sach » hoc sach, doc sach, thuoc sach
chat soc » cham soc, chat hoc, chat doc
van nang » van quang, van ban, van dong
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
soc va » hoc va, loc va, doc va
v nang » va nang, vu nang, voi nang
cuc te » cua te, cuc tieu
thue » thu, thuc, thuy

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 ((v nang) or (van nang)) xa hoi. hieu va chat soc va hanh dien ((cuc te) OR (cuc thue))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((v nang) OR (van nang)) xa hoi. hieu va chat soc va hanh dien ((cuc te) OR (cuc thue)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((v nang) or (van nang)) xa hoi. hieu va chat soc va hanh dien ((cuc te) OR (cuc thue))".
• Adding a wildcard symbol may retrieve word variants: toc sach ((v nang) or (van nang)) xa hoi. hieu va chat soc va hanh dien ((cuc te) OR (cuc thue))*.