Perhaps you should try some spelling variations:
khoa hoc » hoa hoc
te sach » toc sach
vuc van » duc van, luc van, thuc van
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
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: te sach ((ty nang) OR (ty xang)) khoa hoc. hieu ve cac ((xuc van) or (vuc van)) hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty xang)) khoa hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty xang)) khoa hoc. hieu ve cac ((xuc van) or (vuc van)) hanh vi cua cau*".