Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
cac thuc » cach thuc, cac thu, can thuc
hanh hai » thanh hai, nhanh hai, hang hai
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang dai hai. hieu ve cac thuc va hanh hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang dai hai. hieu ve cac thuc va hanh hai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sac ky nang dai hai. hieu ve cac thuc va hanh hai ((cua tre) or (cua te))*.