Perhaps you should try some spelling variations:
ngang cho » nang cho, ngang tho, sang cho
sach ty » sach tu, sach thu, xach tay
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
cua cau » cua cac, cua chu, cua cay
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
anh vi » hanh vi, anh ve, anh vu
anh va » hanh va
ve cac » va cac, vien cac

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) or (sach y)) ngang cho hoc. hieu ve cac luc van ((anh vi) OR (anh va)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach y)) ngang cho hoc. hieu ve cac luc van ((anh vi) OR (anh va)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) or (sach y)) ngang cho hoc. hieu ve cac luc van ((anh vi) OR (anh va)) cua cau*".