Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van ban
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
tang van » dang van, hoang van, trong van
sach ky » sac ky, sach y, sach ty
bac cap » bac can, bac cao, bac cau
nang xa » nang x, lang xa, nang ma
van anh » van thanh, tuan anh, van minh
van bac » van ban, van bao, van hac
di cua » dai cua, doi cua, de cua

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 (tang van)) hoi. hieu van bac cap ((van hanh) OR (van anh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (tang van)) hoi. hieu van bac cap ((van hanh) OR (van anh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((nang xa) or (tang van)) hoi. hieu van bac cap ((van hanh) OR (van anh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (tang van)) hoi. hieu van bac cap ((van hanh) OR (van anh)) di cua triet*.