Perhaps you should try some spelling variations:
ha thanh » va thanh, pham thanh, phan thanh
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
vu lang » va lang, vu dang, cu lang
lang xa » lang ha, dang xay, lang van
bai tum » bai tu, ban tum
cua tre » cua te, cuu tre, cua triet
tum ha » tim ha, tum xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (do sanh)) vu lang xa hoi. lieu va bai tum ha thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (do sanh)) vu lang xa hoi. lieu va bai tum ha thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (do sanh)) vu lang xa hoi. lieu va bai tum ha thanh vi cua tre*.