Perhaps you should try some spelling variations:
danh hoi » danh hoa, dan hoi, danh hoc
chuc tre » thuc tre, chuc theo, thuc te
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xa danh » va danh, dia danh, nam danh
ma hoi » mai hoi, xa hoi, me hoi
cac tu » cac thu, cach tu, tac 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 ((ma hoi) OR (ma hoa)). hieu ve ((cac tu) or (cac du)) xa danh hoi chuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (ma hoa)). hieu ve ((cac tu) OR (cac du)) xa danh hoi chuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) OR (ma hoa)). hieu ve ((cac tu) or (cac du)) xa danh hoi chuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) OR (ma hoa)). hieu ve ((cac tu) or (cac du)) xa danh hoi chuc tre*.