Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
sang mai » sang ma, sang tai, lang mai
hanh vai » hanh va, hanh tai, hanh van
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cau tuc » cau tu, cau luc, cau phuc
y sang » _ sang, duy sang

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach y sang mai hoi. hieu ve ((cau tuc) or (cau truc)) va ((hanh vai) OR (hanh vi)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach y sang mai hoi. hieu ve ((cau tuc) OR (cau truc)) va ((hanh vai) OR (hanh vi)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach y sang mai hoi. hieu ve ((cau tuc) or (cau truc)) va ((hanh vai) OR (hanh vi)) cua vat".
• Adding a wildcard symbol may retrieve word variants: nuoc sach y sang mai hoi. hieu ve ((cau tuc) or (cau truc)) va ((hanh vai) OR (hanh vi)) cua vat*.