Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
nang dai » nang dau, nang tai, lang dai
duc manh » suc manh, duc anh, duc minh
hieu va » lieu va, hieu qua
vuc van » duc van, luc van, thuc van
tai cua » thai cua, tai cuc, tri cua
dai hoi » dai hoc, dai hai, dai moi
va chat » van chat, va phat, cao chat
tu sai » tu san, tu cai, tu lai
tu bai » tu ban, tu bat, te bai
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bai)) ky nang dai hoi. hieu va chat ((vuc van) OR (duc manh)) hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu bai)) ky nang dai hoi. hieu va chat ((vuc van) or (duc manh)) hanh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu bai)) ky nang dai hoi. hieu va chat ((vuc van) or (duc manh)) hanh tai cua te*.