Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
cat cua » chat cua, mat cua, cau cua
so sac » so sach, so dac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
ca cua » co cua

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 ma hoi. hieu va cac luc va hanh ((cat cua) or (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang ma hoi. hieu va cac luc va hanh ((cat cua) OR (ca cua)) triet.
• Adding a wildcard symbol may retrieve word variants: so sac ky nang ma hoi. hieu va cac luc va hanh ((cat cua) or (ca cua)) triet*.