Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
di cua » dai cua, doi cua, de cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• 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 truc)) va danh di cua te~.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) xa hoi. hieu ve ((cac luc) or (cau truc)) va danh di cua te*.