Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
nham thuc » nhan thuc, nam thuc, nham thu
day hanh » day nhanh, dao hanh, da hanh
day manh » van manh, duc manh, ha manh
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
vu sach » vu bach, su sach, vu khach
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
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 ky nang x hoi. hieu van nham thuc ((((day hanh) or (day manh))) or (day thanh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu van nham thuc ((((day hanh) OR (day manh))) OR (day thanh)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu van nham thuc ((((day hanh) or (day manh))) or (day thanh)) di cuu tre*.