Perhaps you should try some spelling variations:
thien van » thi van
vat hanh » vat thanh, van hanh, va hanh
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, 5 hoi
thuc » thu

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 v nang ((x hoi) or (x ho)). ((hieu ve) or (thien van)) am thuc vat hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang ((x hoi) OR (x ho)). ((hieu ve) OR (thien van)) am thuc vat hanh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: su sach v nang ((x hoi) or (x ho)). ((hieu ve) or (thien van)) am thuc vat hanh vi cau treo*.