Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
luc luan » ly luan, tu luan
luan anh » luan danh, tuan anh, lan anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cac luc » cau luc, coc luc, cac nuoc
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. ((hieu va) OR (hieu qua)) cac luc luan anh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. ((hieu va) OR (hieu qua)) cac luc luan anh ((vi cua) OR (vai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. ((hieu va) OR (hieu qua)) cac luc luan anh ((vi cua) or (vai cua)) tre*".