Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
nang cho » nang chon, ngang cho, nang cao
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, vuc van
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cay » cua cac
ve cac » vien cac

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