Perhaps you should try some spelling variations:
bac viet » hoc viet, mai viet, dao viet
dinh tai » dinh toai, dinh tri, dinh thi
ve cham » va cham, ve chat, vu cham
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
tai bac » tao bac, tai cac, tai ban
va dinh » van dinh, va kinh, va tinh
tu san » thu san, tu ban, tu can
va cam » va cham, va cac, va cao
san ky » sang ky, van ky, dan ky
ve cam » ve cac, ve cai, ve cau

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 cam) OR (va cam))) or (ve cham)) duc va dinh tai bac viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky lang xa hoi. hieu ((((ve cam) OR (va cam))) OR (ve cham)) duc va dinh tai bac viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky lang xa hoi. hieu ((((ve cam) OR (va cam))) or (ve cham)) duc va dinh tai bac viet".
• Adding a wildcard symbol may retrieve word variants: tu san ky lang xa hoi. hieu ((((ve cam) OR (va cam))) or (ve cham)) duc va dinh tai bac viet*.