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