Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
chat hoc » chat hoa, chat thom, cho hoc
te sach » toc sach
vuc van » duc van, luc van, chuc van
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
cao hoc » co hoc, cho hoc
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
anh va » hanh va
va cua » va chua, via cua, ca 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 ((cao hoc) or (chat hoc)). hieu va cac ((vuc van) OR (thuc van)) anh va cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((cao hoc) OR (chat hoc)). hieu va cac ((vuc van) OR (thuc van)) anh va cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((cao hoc) or (chat hoc)). hieu va cac ((vuc van) OR (thuc van)) anh va cua cau*".