Perhaps you should try some spelling variations:
danh bat » doanh bat, anh bai, dinh ba
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
bat cua » ban cua, mat cua, bai cua
xa danh » va danh, dia danh, nam danh
cau luc » cau truc, cau phuc
cau tuc » cau truc, cau tu, cau phuc
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 van ((cau tuc) OR (cau luc)) xa danh bat 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 van ((cau tuc) OR (cau luc)) xa danh bat 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 van ((cau tuc) OR (cau luc)) xa danh bat cua tre*".