Perhaps you should try some spelling variations:
doc sach » toc sach, nuoc sach, dac sac
hoc sach » hoc sinh, hoc cac, hoc anh
hanh di » hanh vi, hanh de, hang di
vuc van » duc van, luc van, thuc van
xuc van » duc van, luc van, xuc ban
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
di cua » dai cua, doi cua, de cua

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