Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
cau theo » cau thi
te sach » toc sach
xu lang » cu lang, tu lang, xu dang
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
hanh di » hanh vi, hanh de, hang di

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 ((xu lang) or (truc nano)) xa hoi. hieu van cam xuc ban hanh di ((cau theo) OR (cau tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((xu lang) OR (truc nano)) xa hoi. hieu van cam xuc ban hanh di ((cau theo) OR (cau tao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((xu lang) or (truc nano)) xa hoi. hieu van cam xuc ban hanh di ((cau theo) OR (cau tao))".
• Adding a wildcard symbol may retrieve word variants: te sach ((xu lang) or (truc nano)) xa hoi. hieu van cam xuc ban hanh di ((cau theo) OR (cau tao))*.