Perhaps you should try some spelling variations:
dinh dieu » dinh dien, dinh tieu, vinh dieu
dieu tra » dieu tri, kiem tra, dieu cua
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
tra te » tra tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu ((van cac) or (van ban)) ((xuc va) or (tuc va)) dinh dieu tra te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ((van cac) OR (van ban)) ((xuc va) OR (tuc va)) dinh dieu tra te.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((van cac) or (van ban)) ((xuc va) or (tuc va)) dinh dieu tra te*.