Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
tu sach » thu sach, su sach, te sach
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cau luc » cau truc, cau phuc
cac luc » coc luc, cac nuoc, cac cuoc
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
cua tre » cua te, cuu tre, cua triet

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 lang) or (ky dang)) xa hoi. hieu ve ((cac luc) OR (cau luc)) va danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. hieu ve ((cac luc) OR (cau luc)) va danh sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky dang)) xa hoi. hieu ve ((cac luc) OR (cau luc)) va danh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) xa hoi. hieu ve ((cac luc) OR (cau luc)) va danh sai cua tre*.