Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tri » thanh tri, hanh triet, chinh tri
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
coc tuc » coc luc, hoc thuc, doc thuc
van coc » van hoc, van loc, van co
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang xa hoi. hieu van coc tuc va ((((hanh tri) OR (hanh trinh))) OR (hanh tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y lang xa hoi. hieu van coc tuc va ((((hanh tri) OR (hanh trinh))) or (hanh tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. hieu van coc tuc va ((((hanh tri) OR (hanh trinh))) or (hanh tai)) cua tre*.