Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cau duc » cao duc, cau luc, chu duc
ve cau » ke cau, va cau, ve cac
_ sang » _ san
y sang » duy sang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (cuoc or duoc) cach ((y sang) OR (_ sang)) ma hoi. hieu ve cau duc va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (cuoc OR duoc) cach ((y sang) OR (_ sang)) ma hoi. hieu ve cau duc va hanh vai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(cuoc or duoc) cach ((y sang) OR (_ sang)) ma hoi. hieu ve cau duc va hanh vai cua viet*".