Perhaps you should try some spelling variations:
khoa hoc » hoa hoc
te cach » ve cach, te sach, tu cach
cach tu » cach thuc
tu nang » tru nang, tu nong, tu nano
cho hoc » co hoc
hieu ve » hieu va, hieu van
vuc van » luc van, thuc van, chuc van
duc van » duc va, duc tan, duc manh
cua cay » cua cac
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 cach tu nang ((cho hoc) or (khoa hoc)). hieu ve cac ((vuc van) OR (duc van)) hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cach tu nang ((cho hoc) OR (khoa hoc)). hieu ve cac ((vuc van) OR (duc van)) hanh vi cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach tu nang ((cho hoc) or (khoa hoc)). hieu ve cac ((vuc van) OR (duc van)) hanh vi cua cay*".