Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hai cua » thai cua, dai cua, hoi cua
thuc va » thuc vat, thuc day
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
tu nang » tru nang, tu nong, tu nano
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 tu nang cao hoc. hieu ve cac ((thuc va) OR (thuc dan)) thanh ((vi cua) or (hai cua)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang cao hoc. hieu ve cac ((thuc va) OR (thuc dan)) thanh ((vi cua) OR (hai cua)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang cao hoc. hieu ve cac ((thuc va) OR (thuc dan)) thanh ((vi cua) or (hai cua)) cau*".