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 vi, hanh va, hanh tai
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
vai cua » dai cua, hai cua, lai cua
y sang » _ sang, duy sang
va cau » van cau, va cac, va dau
tuc va » thuc va, tuc xa, duc va

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 va cau ((tuc va) OR (truc va)) hanh vai cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach y sang mai hoi. hieu va cau ((tuc va) OR (truc va)) hanh vai cua vat".
• Adding a wildcard symbol may retrieve word variants: nuoc sach y sang mai hoi. hieu va cau ((tuc va) OR (truc va)) hanh vai cua vat*.