Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu lang
tu nano » truc nano
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, 5 hoi

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 ((tu nang) or (tu nano)) ((x hoi) OR (x ho)). hieu va cao tuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nano)) ((x hoi) OR (x ho)). hieu va cao tuc va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) or (tu nano)) ((x hoi) OR (x ho)). hieu va cao tuc va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tu nano)) ((x hoi) OR (x ho)). hieu va cao tuc va hanh vai cuu tre*.