Perhaps you should try some spelling variations:
hang dien » quang dien, dang dieu, nhan dien
than luc » than duc, thanh luu, thuy luc
dien cua » dieu cua, dien cuc, dien cu
tham luc » tham nuoc, tham thuc, thuy luc
nhan luc » nang luc
co sach » bo sach, cuon sach, hoc sach
va hang » van hang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
sach vu » sach va, sach tu, sach uu
nang xa » nang x, lang xa, nang ma
vu nang » vuc nang, va nang, vu dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach vu nang xa hoi. lieu va ((tham luc) or (((than luc) OR (nhan luc)))) va hang dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach vu nang xa hoi. lieu va ((tham luc) OR (((than luc) OR (nhan luc)))) va hang dien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach vu nang xa hoi. lieu va ((tham luc) or (((than luc) OR (nhan luc)))) va hang dien cua tre".
• Adding a wildcard symbol may retrieve word variants: co sach vu nang xa hoi. lieu va ((tham luc) or (((than luc) OR (nhan luc)))) va hang dien cua tre*.