Perhaps you should try some spelling variations:
thuc thuc » hoc thuc
hoc sach » hoc cac, hoc anh
thuc toc » thac toc, thuc uoc, thuc cuoc
cau treo » cau theo, cau tren, cau triet
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
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) OR (hoc sinh)) ty nang x hoi. hieu va ((thuc toc) or (thuc thuc)) va danh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc sinh)) ty nang x hoi. hieu va ((thuc toc) OR (thuc thuc)) va danh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc sinh)) ty nang x hoi. hieu va ((thuc toc) or (thuc thuc)) va danh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc sinh)) ty nang x hoi. hieu va ((thuc toc) or (thuc thuc)) va danh vi cau treo*.