Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh hai » thanh hai, nhanh hai, hang hai
vat hanh » vat thanh, van hanh, va hanh
nam thuc » nam thuoc, am thuc, nam thu
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
su sach » so sach
vu sach » vu bach, vu khach
hanh xu » hanh sua, hanh cua, hanh mau
hanh tu » anh tu, danh tu
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) thi ((hanh xu) or (hanh tu)) hoi. hieu ve nam thuc vat hanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) thi ((hanh xu) OR (hanh tu)) hoi. hieu ve nam thuc vat hanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) thi ((hanh xu) or (hanh tu)) hoi. hieu ve nam thuc vat hanh hai cua viet*.