Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
nang cho » nang chon, ngang cho, nang cao
van hanh » van thanh, ban hanh, van ban
sach ty » sach y, sach tu, sach thu
cua cau » cua cac, cua chu, cua can
van anh » van thanh, tuan anh, van minh
cac xuc » cam xuc, cac nuoc, chat xuc
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: doc sach ty nang cho hoc. hieu ve cac xuc ((van hanh) or (van anh)) di ((cua cau) OR (cua cay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ty nang cho hoc. hieu ve cac xuc ((van hanh) OR (van anh)) di ((cua cau) OR (cua cay))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ty nang cho hoc. hieu ve cac xuc ((van hanh) or (van anh)) di ((cua cau) OR (cua cay))*".