Perhaps you should try some spelling variations:
chat hoc » chat hoa, chat thom, cho hoc
hanh vai » hanh vi, hanh va, hanh tai
bach ky » bac ky
mai hoi » mai khoi, dai hoi, lai hoi
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
ma hoi » xa hoi, me hoi, va hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang ((((ma hoi) OR (mai hoi))) or (ma hoa)). lieu va chat hoc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky nang ((((ma hoi) OR (mai hoi))) OR (ma hoa)). lieu va chat hoc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ky nang ((((ma hoi) OR (mai hoi))) or (ma hoa)). lieu va chat hoc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang ((((ma hoi) OR (mai hoi))) or (ma hoa)). lieu va chat hoc va hanh vai cua te*.