Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
bo sach » co sach, hoc sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
van bac » van ban, van bao, van hac
cua tre » cuu tre, cua triet, dua tren
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: bo sach ty xang xa hoi. hieu van bac xuc ((van hanh) or (van minh)) thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty xang xa hoi. hieu van bac xuc ((van hanh) OR (van minh)) thai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: bo sach ty xang xa hoi. hieu van bac xuc ((van hanh) or (van minh)) thai ((cua tre) or (cua te))*.