Perhaps you should try some spelling variations:
dinh tri » chinh tri
luu tre » luu tru, cuu tre, luy tre
tri luu » thi luu, tri lieu
va dinh » van dinh, va kinh, va tinh
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
thu san » thuy san, thu ban, phu san
tu san » tu ban, tu can, vu 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 san) OR (thu san)) ky dang xa hoi. hieu ((ve cham) or (vu cham)) hoc va dinh tri luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (thu san)) ky dang xa hoi. hieu ((ve cham) OR (vu cham)) hoc va dinh tri luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (thu san)) ky dang xa hoi. hieu ((ve cham) or (vu cham)) hoc va dinh tri luu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (thu san)) ky dang xa hoi. hieu ((ve cham) or (vu cham)) hoc va dinh tri luu tre*.