Perhaps you should try some spelling variations:
ngang cho » nang cho, ngang tho, sang cho
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
ty ngang » ly ngan, te ngan, tu ngan
luc van » luoc van, duc van, luc va
vai cua » dai cua, hai cua, lai cua
luu van » cuu van, luan van, luu hanh
hieu va » lieu va, hieu qua
cho hoc » co hoc, khoa hoc
cua cau » cua cac, cua chu, cua cay
va cau » van cau, va cac, va dau

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