Perhaps you should try some spelling variations:
nuoc san » nuoc luan, nguoi san, nuoc quan
cau thuc » cau truc, cuu thuc, can thuc
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
san ky » sang ky, van ky, dan ky
ve cau » ke cau, va cau, ve cac
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc san ky nang xa hoi. hieu ve cau thuc van hanh ((de cuu) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc san ky nang xa hoi. hieu ve cau thuc van hanh ((de cuu) OR (de cua)) tre.
• Adding a wildcard symbol may retrieve word variants: nuoc san ky nang xa hoi. hieu ve cau thuc van hanh ((de cuu) or (de cua)) tre*.