Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
thuc toc » thac toc, thuc uoc, thuc thuc
cau treo » cau theo, cau tren, cau triet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
toc va » hoc va, toc ta, tuc va
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty nang x hoi. ((hieu va) OR (hieu qua)) thuc toc va danh vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty nang x hoi. ((hieu va) OR (hieu qua)) thuc toc va danh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang x hoi. ((hieu va) OR (hieu qua)) thuc toc va danh vi cau treo*.