Perhaps you should try some spelling variations:
cao hoat » cac hoat, co hoat, cao chat
hanh vai » hanh va, hanh tai, hanh van
ve chat » van chat
va chat » van chat, va phat, cao chat
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cuu ve » cuu va
thiet » thieu

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 cao hoat. hieu ((ve chat) or (va chat)) cuu ve ((hanh vai) or (hanh vi)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoat. hieu ((ve chat) OR (va chat)) cuu ve ((hanh vai) OR (hanh vi)) va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cao hoat. hieu ((ve chat) or (va chat)) cuu ve ((hanh vai) or (hanh vi)) va thiet*.