Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cau loc » hau loc, cau hoc, cau luc
va hanh » van hanh, va thanh, va danh
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((nang xa) or (lang van)) hoi. hieu van cau loc va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (lang van)) hoi. hieu van cau loc va hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (lang van)) hoi. hieu van cau loc va hanh dai cua triet*.