Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
day nhanh » day thanh, dac nhan, day manh
duy nhanh » duy khanh, duy anh, duy phan
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
day hanh » day thanh, dao hanh, day manh
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
de cua » le cua, te cua, dieu cua
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 nhan thuc ((day hanh) OR (((day nhanh) OR (duy nhanh)))) de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu van nhan thuc ((day hanh) OR (((day nhanh) OR (duy nhanh)))) de cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu van nhan thuc ((day hanh) OR (((day nhanh) OR (duy nhanh)))) de cua tre*.