Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
vai cua » dai cua, hai cua, lai cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
cua cu » cua chu, cua cau, cua su
o hoi » co hoi, o hoc, o hai

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 nang ((5 hoi) or (o hoi)). hieu ve cam duc ban hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((5 hoi) OR (o hoi)). hieu ve cam duc ban hanh vai cua cu.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((5 hoi) or (o hoi)). hieu ve cam duc ban hanh vai cua cu*.