Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
danh doi » danh di, thanh doi, dung doi
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » dai hoi, lai hoi, mai doi
hieu ve » hieu va, hieu van
cac tac » cac toc, cac bac, cac dac
xa danh » va danh, dia danh, nam danh
doi cua » dai cua, hoi cua
ve cac » va cac, vien cac
tac xa » tuc xa, tac da
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: su sach ky nang ((mai hoi) or (mai khoi)). hieu ve cac tac xa danh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((mai hoi) OR (mai khoi)). hieu ve cac tac xa danh doi cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((mai hoi) or (mai khoi)). hieu ve cac tac xa danh doi cua te*.