Perhaps you should try some spelling variations:
hanh tue » hanh tu, hanh tuyen, hanh theo
tu sach » thu sach, su sach, te sach
tue cua » te cua
cuc ban » cua ban, cac ban, cuu ban
xuc ban » duc ban, quoc ban, xuat ban
vu cham » va cham, vu kham, tu cham
sach ky » sac ky, sach y, sach ty
hieu vu » hieu va, hieu ve, hieu su
dai moi » doi moi, dai hoi
mai hoi » mai khoi, dai hoi, lai hoi
cua te » cua tu

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 ky nang ((mai hoi) or (dai moi)). hieu vu cham ((xuc ban) OR (cuc ban)) hanh tue cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mai hoi) OR (dai moi)). hieu vu cham ((xuc ban) OR (cuc ban)) hanh tue cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((mai hoi) or (dai moi)). hieu vu cham ((xuc ban) OR (cuc ban)) hanh tue cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mai hoi) or (dai moi)). hieu vu cham ((xuc ban) OR (cuc ban)) hanh tue cua te*.