Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
luc tuan » luc luan, luc quan, luu tuan
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua

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

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