Perhaps you should try some spelling variations:
dong hoc » dong co, dong luc
cham xuc » chat xuc, cham soc, pham duc
van tuan » van quan, van ban, anh tuan
hoc hoi » hoc khoi, hoc hoa, hoc noi
hieu tu » chieu tu, hieu tuc, hien tu
ky dong » ly dong, ky dang, ky cong
ca cua » co cua
so cac » sao cac, so cap, o cac
va cua » va chua, via cua, ma cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so cac ky dong hoc hoi. hieu tu ((cham xuc) or (cam xuc)) van tuan ((va cua) or (ca cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so cac ky dong hoc hoi. hieu tu ((cham xuc) OR (cam xuc)) van tuan ((va cua) OR (ca cua)) tre.
• Adding a wildcard symbol may retrieve word variants: so cac ky dong hoc hoi. hieu tu ((cham xuc) or (cam xuc)) van tuan ((va cua) or (ca cua)) tre*.