Perhaps you should try some spelling variations:
dang xay » dang van, van xay
lang van » dang van, tang van, hoang van
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
te cua » tue cua, de cua
le cua » ly cua
tai ky » thai ky, trai ky, sai ky

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

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