Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
xa thanh » va thanh, ha thanh, ta thanh
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
ban tum » ban tu
cua tre » cua te, cuu tre, cua triet
dang ha » dong ha, dung ha, lang ha
su dang » su dung
bo sach » co sach, hoc sach
tum xa » tuc xa, tu xa
vi cua » vai cua, di cua
ha hoi » hoa hoi, ha noi, xa hoi

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 (bo sach))) or (do sanh)) su dang ha hoi. hieu van ban tum xa thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sach) OR (bo sach))) OR (do sanh)) su dang ha hoi. hieu van ban tum xa thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((su sach) or (bo sach))) or (do sanh)) su dang ha hoi. hieu van ban tum xa thanh vi cua tre*.