Perhaps you should try some spelling variations:
ngang cho » nang cho, ngang tho, sang cho
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ty ngang » ly ngan, te ngan, tu ngan
cho hoc » co hoc, khoa hoc
hieu ve » hieu va
sach ty » sach y, sach tu, sach thu
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua cau » cua cac, cua chu, cua cay
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: toc sach ty ngang cho hoc. ((hieu ve) OR (hieu van)) cac ((xuc van) or (duc van)) anh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ngang cho hoc. ((hieu ve) OR (hieu van)) cac ((xuc van) OR (duc van)) anh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty ngang cho hoc. ((hieu ve) OR (hieu van)) cac ((xuc van) or (duc van)) anh vi cua cau*".