Perhaps you should try some spelling variations:
chat hoc » chat hoa, chat thom, cho hoc
so danh » do danh, so sanh, so dan
danh ky » hanh ky, dan ky, dang ky
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc cac » xuc tac, tuc cac, xuc cam
ve cac » va cac, vien cac
dan va » doan va, ban va, han va
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so danh ky nang ((chat hoc) or (co hoc)). hieu ve cac xuc cac ((dan va) or (dan ca)) cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so danh ky nang ((chat hoc) OR (co hoc)). hieu ve cac xuc cac ((dan va) OR (dan ca)) cua cu.
• Adding a wildcard symbol may retrieve word variants: so danh ky nang ((chat hoc) or (co hoc)). hieu ve cac xuc cac ((dan va) or (dan ca)) cua cu*.