Perhaps you should try some spelling variations:
van thanh » ban thanh
van tuan » van quan, van ban, anh tuan
te sach » toc sach
nam duc » nam duoc, pham duc, nam thuc
su viet » so viet
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
va nam » van nam, ha nam, va nay
vi su » va su, ve su, ki su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang xa) OR (nang x)) hoi. lieu va nam duc ((van thanh) OR (van tuan)) vi su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) or (nang x)) hoi. lieu va nam duc ((van thanh) OR (van tuan)) vi su viet~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (nang x)) hoi. lieu va nam duc ((van thanh) OR (van tuan)) vi su viet*.