Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang cho » nang chon, ngang cho, nang cao
xuc van » duc van, luc van, xuc ban
cua cau » cua cac, cua chu, cua can
vuc van » duc van, luc van, thuc van
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cay » cua cac
ve cac » va 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: toc sach ty nang cho hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi ((cua cau) or (cua cay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cho hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi ((cua cau) OR (cua cay))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang cho hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi ((cua cau) or (cua cay))*".