Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
cua nang » chua nang, cua dang, cua hang
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
luc van » luoc van, luu van, duc van
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang x hoi. hieu cua nang luc van hanh vi ((va thiet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang x hoi. hieu cua nang luc van hanh vi ((va thiet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang x hoi. hieu cua nang luc van hanh vi ((va thiet) or (su triet))*.