Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van chat
van hai » van ha, van chat, van hanh
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
y nang » ky nang, ly nang, v nang
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu
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: tu sach y nang x hoi. hieu ((van cac) or (((van hac) or (van hai)))) nuoc va tinh va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ((van cac) OR (((van hac) OR (van hai)))) nuoc va tinh va cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ((van cac) or (((van hac) or (van hai)))) nuoc va tinh va cua tu*.