Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hanh lam » thanh lap, hanh kem, hanh va
thi hanh » thi thanh
thuc dan » thuc hanh, hoc dan
hai cua » thai cua, dai cua, hoi cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet

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 ((mang may) or (hang va)) hoi. thi hanh lam ((thuc vat) or (thuc dan)) thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((mang may) OR (hang va)) hoi. thi hanh lam ((thuc vat) OR (thuc dan)) thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((mang may) or (hang va)) hoi. thi hanh lam ((thuc vat) or (thuc dan)) thanh hai cua tre*.