Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
duy nhanh » duy khanh, day nhanh, duy anh
phan thuc » nhan thuc, phap thuc, pham thuc
day hanh » day nhanh, dao hanh, day manh
vu sach » vu bach, su sach, vu khach
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
ve phan » va phan, ke phan, ve phat
hieu ve » hieu va, hieu van
de cuu » de 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 ve phan thuc ((((day hanh) OR (day thanh))) or (duy nhanh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ve phan thuc ((((day hanh) OR (day thanh))) OR (duy nhanh)) de cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu ve phan thuc ((((day hanh) OR (day thanh))) or (duy nhanh)) de cuu tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ve phan thuc ((((day hanh) OR (day thanh))) or (duy nhanh)) de cuu tre*.