Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
van anh » van thanh, tuan anh, van minh
tu sach » thu sach, su sach, te sach
ki su » ky su

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

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