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