Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
dang xay » dang van, van xay
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
tai cua » thai cua, tai cuc, dai cua
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
sai ky » sac ky
te sai » te tai, te bai, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky dang xay hoi. hieu va chat luc ((va hanh) or (van hanh)) ((tai cua) or (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky dang xay hoi. hieu va chat luc ((va hanh) OR (van hanh)) ((tai cua) OR (tri cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sai ky dang xay hoi. hieu va chat luc ((va hanh) or (van hanh)) ((tai cua) or (tri cua)) tre*.