Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh vai » hanh vi, hanh va, hanh tai
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
thi hang » thi hanh, thi nang, thi hong
ty hang » ly hang, ty xang, thu hang
vai cau » va cau, van cau, vai cac
su sach » so sach, vu sach
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty hang) or (thi hang)) co hoc. hieu van cham ((xuc va) OR (duc va)) hanh vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (thi hang)) co hoc. hieu van cham ((xuc va) OR (duc va)) hanh vai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (thi hang)) co hoc. hieu van cham ((xuc va) OR (duc va)) hanh vai cau treo".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (thi hang)) co hoc. hieu van cham ((xuc va) OR (duc va)) hanh vai cau treo*.