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 » vu sach
ban tum » ban tu
cua tre » cua te, cuu tre, cua triet
dang ha » dong ha, dung ha, lang ha
vu dang » su dang, vu quang, cua dang
so sach » so sanh, bo sach, co 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 (so sach))) or (do sanh)) vu 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 (so sach))) OR (do sanh)) vu dang ha hoi. hieu van ban tum xa thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((su sach) OR (so sach))) or (do sanh)) vu dang ha hoi. hieu van ban tum xa thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((su sach) OR (so sach))) or (do sanh)) vu dang ha hoi. hieu van ban tum xa thanh vi cua tre*.