Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
dieu cua » dieu tra
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua duc » cua tuc, cua nuoc, cua quoc
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ca duc » cao duc, ca dua, ha duc
de cua » le cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky lang xa hoi. hieu qua ((ca duc) OR (cua duc)) van thanh ((de cua) or (dieu cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky lang xa hoi. hieu qua ((ca duc) OR (cua duc)) van thanh ((de cua) OR (dieu cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky lang xa hoi. hieu qua ((ca duc) OR (cua duc)) van thanh ((de cua) or (dieu cua)) viet*".