Perhaps you should try some spelling variations:
khoa hoc » hoa hoc
ven hanh » ven thanh, van hanh, ve hanh
toc sach » hoc sach, doc sach, thuoc sach
thu bang » thu ban, thu hang, chu bang
vung ven » vung gen, vung van, vung bien
cac vung » cac ung, cac chung, cach dung
hieu ve » hieu va, hieu van
cua cay » cua cac
cho hoc » co hoc
ve cac » va 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: ((te sach) OR (toc sach)) thu bang ((cho hoc) or (khoa hoc)). hieu ve cac vung ven hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thu bang ((cho hoc) OR (khoa hoc)). hieu ve cac vung ven hanh vi cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) thu bang ((cho hoc) or (khoa hoc)). hieu ve cac vung ven hanh vi cua cay*".