Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hieu van » hieu va, thien van, lieu va
va nhanh » va thanh, va hanh, va nhan
cam thuc » am thuc, nam thuc, cam thu
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
tu cach » tu cac
su sach » so sach, vu sach
ca tren » cau tren, cu tren, la tren
ma hoi » mai hoi, xa hoi, me hoi
hai ca » hai cua, hai ba, bai ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang ((ma hoi) or (ma hoa)). hieu van cam thuc va nhanh hai ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang ((ma hoi) OR (ma hoa)). hieu van cam thuc va nhanh hai ca tren.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang ((ma hoi) or (ma hoa)). hieu van cam thuc va nhanh hai ca tren*.