Perhaps you should try some spelling variations:
duy sang » duy van, duy can, duy anh
hieu ve » hieu va, hieu van
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
y sang » _ sang
ma hoi » mai hoi, xa hoi, ma hoa
ve cau » ke cau, va cau, ve cac
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ((y sang) or (duy sang)) ma hoi. hieu ve cau tuc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((y sang) OR (duy sang)) ma hoi. hieu ve cau tuc va hanh vi cua vat*.