Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
te sach » toc sach
vuc van » duc van, luc van, thuc van
hoc cac » hoc cao
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
van anh » van thanh, tuan anh, van minh
hieu va » lieu va, hieu qua
cac vuc » cac nuoc, cac vung, cac cuoc
vi cua » vai cua, di cua
anh vi » hanh vi, anh va, anh ve
ma hoi » mai hoi, xa hoi, ma hoa
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (((hoc sach) OR (hoc cac)))) ty nang ma hoi. hieu va cac vuc van anh vi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (((hoc sach) OR (hoc cac)))) ty nang ma hoi. hieu va cac vuc van anh vi cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (((hoc sach) OR (hoc cac)))) ty nang ma hoi. hieu va cac vuc van anh vi cua su".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (((hoc sach) OR (hoc cac)))) ty nang ma hoi. hieu va cac vuc van anh vi cua su*.