Perhaps you should try some spelling variations:
nuoc san » nuoc luan, nguoi san, nuoc quan
thuc van » thuc vat, thuc dan, thuc va
thanh le » thinh le, thanh de, thanh liem
thanh ve » hanh ve, thanh va, thanh vien
hieu ve » hieu va, hieu van
phuc va » phuc vu, thuc va, chuc va
cua tre » cua te, cuu tre, cua triet
san ky » sang ky, van ky, dan ky
ve cau » ke cau, va cau, ve cac

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 x ho. hieu ve cau ((thuc van) or (phuc va)) ((thanh le) OR (thanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc san ky nang x ho. hieu ve cau ((thuc van) OR (phuc va)) ((thanh le) OR (thanh ve)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc san ky nang x ho. hieu ve cau ((thuc van) or (phuc va)) ((thanh le) OR (thanh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc san ky nang x ho. hieu ve cau ((thuc van) or (phuc va)) ((thanh le) OR (thanh ve)) cua tre*.