Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cam thu » nam thu, cac thu, ca thu
cua tre » cua te, cuu tre, cua triet
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
te sach » toc sach
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
cam tu » nam tu, dam tu, tam tu
y sang » _ sang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa

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 y sang ma hoi. hieu va ((cam tu) OR (cam thu)) va danh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y sang ma hoi. hieu va ((cam tu) OR (cam thu)) va danh vi ((cua tre) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y sang ma hoi. hieu va ((cam tu) OR (cam thu)) va danh vi ((cua tre) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te sach y sang ma hoi. hieu va ((cam tu) OR (cam thu)) va danh vi ((cua tre) or (cua viet))*.