Perhaps you should try some spelling variations:
bac viet » hoc viet, mai viet, dao viet
dinh tai » dinh toai, dinh tri, dinh thi
tai bac » tao bac, tai cac, tai ban
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ban ky » van ky, dan ky
ve cam » ve cac, va cam, ve cai
luc va » tuc va, loc va
tu ban » thu ban, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky lang xa hoi. hieu ((ve cam) or (ve cham)) ((duc va) or (luc va)) dinh tai bac viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky lang xa hoi. hieu ((ve cam) OR (ve cham)) ((duc va) OR (luc va)) dinh tai bac viet.
• Adding a wildcard symbol may retrieve word variants: tu ban ky lang xa hoi. hieu ((ve cam) or (ve cham)) ((duc va) or (luc va)) dinh tai bac viet*.