Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
lang ha » long ha
cau xuc » cam xuc, cau truc, chat xuc
sach ty » sach y, sach tu, sach thu
cau luc » cau truc, cau phuc
va hanh » va thanh, va danh, ban hanh
ty lang » tay lang, ty xang, ty hang
ha hoi » hoa hoi, ha noi, xa hoi
ki ve » ke ve, gi ve, vi ve

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 ty lang ha hoi. lieu va ((cau xuc) OR (cau luc)) ((va hanh) or (van hanh)) ki ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty lang ha hoi. lieu va ((cau xuc) OR (cau luc)) ((va hanh) OR (van hanh)) ki ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty lang ha hoi. lieu va ((cau xuc) OR (cau luc)) ((va hanh) or (van hanh)) ki ve triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ty lang ha hoi. lieu va ((cau xuc) OR (cau luc)) ((va hanh) or (van hanh)) ki ve triet*.