Perhaps you should try some spelling variations:
thanh tai » thanh toan, doanh tai, thanh san
thanh hai » thanh phan, thanh hoa, thanh san
dang mam » dang nam, dang mau, dang mat
hieu van » hieu va, thien van, lieu va
toc sac » toc sach, toc san, hoc sach
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
dang ma » dang mau, dang mat, tang ma
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky ((dang ma) or (dang mam)) hoi. hieu van cac xuc va ((thanh hai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((dang ma) OR (dang mam)) hoi. hieu van cac xuc va ((thanh hai) OR (thanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((dang ma) or (dang mam)) hoi. hieu van cac xuc va ((thanh hai) or (thanh tai)) cua tre*.