Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
cua tre » cuu tre, cua triet, dua tren
bao xuc » bao luc, bao thuc
van bao » van ban, van dao
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) OR (nang x)) hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (nang x)) hoi. hieu van bao xuc va thanh trinh ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) OR (nang x)) hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) OR (nang x)) hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cua te))*.