Perhaps you should try some spelling variations:
dang khai » dang khoi, quang khai, dang thi
dang hai » hang hai, dung hai, dong hai
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
cau treo » cau theo, cau tren, cau triet
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cau » va cau, van cau, vai cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky ((dang hai) OR (dang khai)) hoi. hieu van nam thuc va hanh vai cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((dang hai) OR (dang khai)) hoi. hieu van nam thuc va hanh vai cau treo".
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((dang hai) OR (dang khai)) hoi. hieu van nam thuc va hanh vai cau treo*.