Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
hanh sua » hinh su, hanh va, hanh tu
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
so sac » so sach, so dac
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao

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

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