Perhaps you should try some spelling variations:
dinh tri » chinh tri
luu tre » luu tru, cuu tre, luy tre
vu cham » va cham, vu kham, tu cham
tri luu » thi luu, tri lieu
va dinh » van dinh, va kinh, va tinh
ve chim » va chim, ve chinh, te chiem
ve cham » va cham, ve chat, viet cham
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xa hoi. hieu ((((ve cham) OR (ve chim))) or (vu cham)) hoc va dinh tri luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu ((((ve cham) OR (ve chim))) OR (vu cham)) hoc va dinh tri luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xa hoi. hieu ((((ve cham) OR (ve chim))) or (vu cham)) hoc va dinh tri luu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu ((((ve cham) OR (ve chim))) or (vu cham)) hoc va dinh tri luu tre*.