Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
dinh tri » chinh tri
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
dinh vi » dinh ve, dinh viet, dinh thi
luu tre » luu tru, cuu tre, luy tre
xuc va » duc va, tuc va, luc va

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

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