Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
nham thuc » nhan thuc, nam thuc, nham thu
day hanh » day thanh, day manh, da hanh
dao hanh » dao thanh, dang hanh, ban hanh
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
cua tre » cua te, cuu tre, cua triet
san ky » sang ky, van ky, dan ky
di cua » dai cua, doi cua, de cua
vu san » va san, vu ban
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 san ky nang x hoi. hieu van nham thuc ((((day hanh) or (dao hanh))) or (day nhanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky nang x hoi. hieu van nham thuc ((((day hanh) OR (dao hanh))) OR (day nhanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu san ky nang x hoi. hieu van nham thuc ((((day hanh) or (dao hanh))) or (day nhanh)) di cua tre*.