Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
va hanh » va thanh, va danh, ban hanh
cua te » cua tu

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) or (sach thu)) lang xa hoi. hieu van cau xuc ((va hanh) OR (van hanh)) tri cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach thu)) lang xa hoi. hieu van cau xuc ((va hanh) OR (van hanh)) tri cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) or (sach thu)) lang xa hoi. hieu van cau xuc ((va hanh) OR (van hanh)) tri cua te".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach thu)) lang xa hoi. hieu van cau xuc ((va hanh) OR (van hanh)) tri cua te*.