Perhaps you should try some spelling variations:
duoc ban » duc ban, quoc ban, buoc ban
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
ve tao » ve bao, de tao, ve tac
cua te » cua tu
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: su ((sach ky) OR (sach y)) nang x hoi. hieu ve tao duoc ban hanh vai ((cua viet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang x hoi. hieu ve tao duoc ban hanh vai ((cua viet) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) nang x hoi. hieu ve tao duoc ban hanh vai ((cua viet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) nang x hoi. hieu ve tao duoc ban hanh vai ((cua viet) or (cua te))*.