Perhaps you should try some spelling variations:
sinh ky » sinh ly, sinh y, kinh ky
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
cuu tre » cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
chuc va » thuc vat
hieu ve » hieu va, hieu van
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: hoc sinh ky nang ma hoa. hieu ve cau ((chuc va) OR (thuc va)) hanh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky nang ma hoa. hieu ve cau ((chuc va) OR (thuc va)) hanh di ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ky nang ma hoa. hieu ve cau ((chuc va) OR (thuc va)) hanh di ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky nang ma hoa. hieu ve cau ((chuc va) OR (thuc va)) hanh di ((cua tre) or (cuu tre))*.