Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hang doi » hang di, hang loi, huong doi
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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 ky nang ma hoa. hieu van nam ((duc va) or (thuc va)) hang doi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoa. hieu van nam ((duc va) OR (thuc va)) hang doi ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoa. hieu van nam ((duc va) or (thuc va)) hang doi ((cua tre) OR (cua te))*".