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