Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
tu nano » truc nano
nano co » nano cuo, nang co, nano o
duy van » duy vat, dung van
cua cay » cua cac
ve cac » vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu nano co hoc. hieu ((ve cac) or (va cac)) duy van hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu nano co hoc. hieu ((ve cac) OR (va cac)) duy van hanh vi cua cay*.