Perhaps you should try some spelling variations:
hanh dien » nhanh dien, hang dien, danh dien
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cuc te » cuc thue, cuc tieu
cua te » cua tu
doc va » duoc va, hoc va, duc va
sach v » sach va, sach y, sach 2
soc va » hoc va, loc va, goc va
v nang » va nang, vu nang, van nang

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

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