Perhaps you should try some spelling variations:
duy nhanh » duy khanh, day nhanh, duy anh
cham thuc » nham thuc, pham thuc, tham thuc
day manh » van manh, duc manh, ha manh
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
vu sach » vu bach, su sach, vu khach
da hanh » dao hanh, da thanh, dan hanh
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x hoi. hieu van cham thuc ((((da hanh) or (day manh))) or (duy nhanh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x hoi. hieu van cham thuc ((((da hanh) OR (day manh))) OR (duy nhanh)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x hoi. hieu van cham thuc ((((da hanh) or (day manh))) or (duy nhanh)) di cuu tre*.