Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hinh tri » chinh tri, dinh tri, hinh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, dang xay
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc
da hinh » doan hinh, dia chinh, dang hinh
cua tre » cua te, cuu tre, cua triet
luc da » luc dai, luc va, luc ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((mang xa) or (nang x)) hoi. hieu van cau luc da hinh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((mang xa) OR (nang x)) hoi. hieu van cau luc da hinh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((mang xa) or (nang x)) hoi. hieu van cau luc da hinh tri cua tre*.