Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
cau treo » cau theo, cau tren, cau triet
te sach » toc sach
hieu ve » hieu va
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc 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: ((te sach) or (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh vi cau treo*.