Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
chat duc » chat xuc, chat doc, chet duoc
duc van » duc va, duc tan, duc manh
ky dang » ky nang, ky danh
dan hoi » dan hoc, van hoi, dang khoi
vai cua » dai cua, hai cua, lai cua
dai hoi » dai hoc, dai hai, dai moi
hieu vu » hieu va, hieu ve, hieu su
vu chat » va chat, ve chat, du chat
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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: tu sac ky dang ((dan hoi) or (dai hoi)). hieu vu chat duc van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ((dan hoi) OR (dai hoi)). hieu vu chat duc van hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ((dan hoi) or (dai hoi)). hieu vu chat duc van hanh vai cua te*.