Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luot van
te sach » toc sach
luc van » luu van, duc van, luc va
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
ty hang » ly hang, thi hang, thu hang
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 sach ((ty hang) OR (ty xang)) cho hoc. hieu ve cac ((luc van) or (luoc van)) hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty hang) OR (ty xang)) cho hoc. hieu ve cac ((luc van) OR (luoc van)) hanh vi cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty hang) OR (ty xang)) cho hoc. hieu ve cac ((luc van) or (luoc van)) hanh vi cua cay*".