Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach kem
hanh va » hang va, hanh vi
xa hanh » xa thanh, xa khanh, va hanh
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, cua triet
mang xa » lang xa, mang may, dang xay
sach ty » sach y, sach tu, sach thu
va cua » va chua, via cua, ca cua

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 ky) or (sach ty)) ((mang xa) or (nang x)) hoi. hieu van cau tuc xa hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) ((mang xa) OR (nang x)) hoi. hieu van cau tuc xa hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) ((mang xa) or (nang x)) hoi. hieu van cau tuc xa hanh va cua tre*.