Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
dinh vi » dinh ve, dinh viet, dinh tri
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
luu tre » luu tru, cuu tre, luy tre
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi luu » vi lua

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) OR (tuc va)) dinh vi 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) OR (tuc va)) dinh vi 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) OR (tuc va)) dinh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) xa hoi. hieu van chat ((xuc va) OR (tuc va)) dinh vi luu tre*.