Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac nuoc
cac tac » cac toc, cac bac, cac dac
va danh » va dinh, va dan, va hanh
danh ca » dan ca, doanh cua, danh cho
tu san » thu san, tu ban, tu can
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu
san ky » sang ky, van ky, dan ky
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang ma hoi. hieu va ((cac tuc) or (cac tac)) va danh ca ((cua te) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang ma hoi. hieu va ((cac tuc) OR (cac tac)) va danh ca ((cua te) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ma hoi. hieu va ((cac tuc) or (cac tac)) va danh ca ((cua te) or (va thiet))*.