Perhaps you should try some spelling variations:
dinh tai » dinh toai, dinh tri, dinh thi
hoc viet » hoc hien
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va dinh » van dinh, va kinh, va tinh
tai hoc » thai hoc, dai hoc, bai hoc
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky

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 ve) OR (hieu va)) cam duc va dinh tai hoc viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cam duc va dinh tai hoc viet".
• Adding a wildcard symbol may retrieve word variants: tu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cam duc va dinh tai hoc viet*.