Perhaps you should try some spelling variations:
van quan » van ban
cao suc » cao su, cao duc
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cao tuc » dao tuc, cao duc, cao toc
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 hoi. lieu va ((cao tuc) or (cao suc)) va danh ((ban quan) OR (van quan)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. lieu va ((cao tuc) OR (cao suc)) va danh ((ban quan) OR (van quan)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. lieu va ((cao tuc) or (cao suc)) va danh ((ban quan) OR (van quan)) tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. lieu va ((cao tuc) or (cao suc)) va danh ((ban quan) OR (van quan)) tren*.