Perhaps you should try some spelling variations:
dinh tri » chinh tri
vu sach » vu bach, su sach, vu khach
va dinh » van dinh, va kinh, va tinh
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
va hai » van hai, va chai, va khai
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
ma hai » ta hai, xa hai, manh hai
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky sang ((ma hai) OR (va hai)). hieu ((ve cam) or (ve cac)) xuc va dinh tri cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky sang ((ma hai) OR (va hai)). hieu ((ve cam) OR (ve cac)) xuc va dinh tri cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky sang ((ma hai) OR (va hai)). hieu ((ve cam) or (ve cac)) xuc va dinh tri cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky sang ((ma hai) OR (va hai)). hieu ((ve cam) or (ve cac)) xuc va dinh tri cua te*.