Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach thi » sach thu, sach tai, sach thieu
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
thi hanh » thi thanh
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc day
hanh ma » hanh mau, hanh may, hanh va
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
ve nam » he nam, va nam, le nam
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: tu sach thi hanh ma hoi. hieu ve nam ((thuc va) or (thuc dan)) hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh ma hoi. hieu ve nam ((thuc va) OR (thuc dan)) hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh ma hoi. hieu ve nam ((thuc va) or (thuc dan)) hanh vai cua viet*.