Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
nang cho » nang chon, ngang cho, nang cao
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
cua cau » cua chu, cua can, cua cu
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
sach ty » sach y, sach tu, sach thu
van cac » van hac, van cau, van bac
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang

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