Perhaps you should try some spelling variations:
nang cho » nang chon, ngang cho, nang cao
thuc van » thuc vat, thuc dan, thuc va
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ty » sach y, sach tu, sach thu
vuc van » duc van, luc van, chuc van
van cac » van hac, van cau, van bac
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cay » cua cac
anh ve » hanh ve, anh viet, thanh ve
anh va » hanh va

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 nang cho hoc. hieu van cac ((vuc van) OR (thuc van)) ((anh ve) or (anh va)) cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang cho hoc. hieu van cac ((vuc van) OR (thuc van)) ((anh ve) OR (anh va)) cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang cho hoc. hieu van cac ((vuc van) OR (thuc van)) ((anh ve) or (anh va)) cua cay*".