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
khoa hoi » khoan hoi, khoa hoc, khoa doi
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
hieu ve » hieu va, hieu van
hai cua » thai cua, dai cua, hoi cua
ve nam » he nam, va nam, le nam
te san » te ban, ke san, tu san
te sac » te sach, te cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te san)) ((ky lang) or (ky dang)) khoa hoi. hieu ve nam thuc vat hanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te san)) ((ky lang) OR (ky dang)) khoa hoi. hieu ve nam thuc vat hanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te san)) ((ky lang) or (ky dang)) khoa hoi. hieu ve nam thuc vat hanh hai cua viet*.