Perhaps you should try some spelling variations:
tinh tri » dinh tri, minh tri, chinh tri
thu ban » thu hang
va tinh » may tinh
ve cham » va cham, ve chat, vu cham
ca viet » va viet, co viet, hoa viet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
ban ky » van ky, dan ky
xuc va » duc va, tuc va, luc va
tri ca » tri cua, tri cac, tri va
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ban ky ((nang xa) or (nang ma)) hoi. hieu ((ve cai) or (ve cham)) xuc va tinh tri ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ban ky ((nang xa) OR (nang ma)) hoi. hieu ((ve cai) OR (ve cham)) xuc va tinh tri ca viet.
• Adding a wildcard symbol may retrieve word variants: thu ban ky ((nang xa) or (nang ma)) hoi. hieu ((ve cai) or (ve cham)) xuc va tinh tri ca viet*.