Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
dang xay » dang van, van xay
hanh dao » lanh dao, thanh dat, thanh dam
lang ha » long ha
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
sai ky » sac ky
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
dao va » dao van, tao va, do va
tu sai » tu bai, tu san, tu cai

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 ((lang ha) or (dang xay)) hoi. hieu va cam luc va hanh dao va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((lang ha) OR (dang xay)) hoi. hieu va cam luc va hanh dao va triet.
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((lang ha) or (dang xay)) hoi. hieu va cam luc va hanh dao va triet*.