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