Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
cua tre » cuu tre, cua triet, dua tren
thuc va » thuc vat, thuc day
sach ty » sach y, sach tu, sach thu
cua te » cua tu
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang x hoi. lieu va cao ((thuc va) or (thuc dan)) thanh tai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. lieu va cao ((thuc va) OR (thuc dan)) thanh tai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang x hoi. lieu va cao ((thuc va) or (thuc dan)) thanh tai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. lieu va cao ((thuc va) or (thuc dan)) thanh tai ((cua tre) OR (cua te))*.