Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
giau cua » gian cua, dieu cua, bieu cua
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
duc ban » duc tan, duc van, dua ban
gia cua » gian cua, gia cuc, nghia cua
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((van cac) or (van cau)) duc ban hanh ((giau cua) OR (gia cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ((van cac) OR (van cau)) duc ban hanh ((giau cua) OR (gia cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ((van cac) or (van cau)) duc ban hanh ((giau cua) OR (gia cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ((van cac) or (van cau)) duc ban hanh ((giau cua) OR (gia cua)) tre*.