Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh toan, thanh hai
hieu van » hieu va, thien van, lieu va
lam xuc » cam xuc, lam duoc
van lam » van nam
cua tre » cua te, cuu tre, cua triet
dang va » dang van, dang vat, hang va
dang ha » dong ha, dung ha, lang ha
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
su sac » su sach, su cac, su xac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((dang va) OR (dang ha)) hoi. hieu van lam xuc va ((thanh phan) OR (thanh san)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((dang va) or (dang ha)) hoi. hieu van lam xuc va ((thanh phan) OR (thanh san)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((dang va) or (dang ha)) hoi. hieu van lam xuc va ((thanh phan) OR (thanh san)) cua tre*.