Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nang noi » nang doc
nang doi » nang doc, hang doi, nang dong
va triet » va thiet, va trien, ve triet
lang van » dang van, tang van, hoang van
van hoi » van hoa, van hoc, van hoe
cau tuc » cau truc, cau tu, cau phuc
sach ky » sac ky, sach y, sach ty
cau luc » cau truc, cau phuc
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky lang van hoi. hieu van ((cau tuc) OR (cau luc)) xa ((nang doi) or (nang noi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang van hoi. hieu van ((cau tuc) OR (cau luc)) xa ((nang doi) OR (nang noi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang van hoi. hieu van ((cau tuc) OR (cau luc)) xa ((nang doi) or (nang noi)) va triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang van hoi. hieu van ((cau tuc) OR (cau luc)) xa ((nang doi) or (nang noi)) va triet*.