Perhaps you should try some spelling variations:
te sach » toc sach
xa nong » xa dong, xuat nong, may nong
xa nang » da nang, va nang, ca nang
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
van cac » van hac, van bac, dan cac
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su viet » so viet
doi su » oi su, don su, voi su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu ((van cac) OR (van cau)) tuc ((xa nang) or (xa nong)) doi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((van cac) OR (van cau)) tuc ((xa nang) OR (xa nong)) doi su viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((van cac) OR (van cau)) tuc ((xa nang) or (xa nong)) doi su viet*".