Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
day hanh » day nhanh, day thanh, dao hanh
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
cua te » cua tu
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 pham thuc ((day hanh) or (duy khanh)) de ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ve pham thuc ((day hanh) OR (duy khanh)) de ((cua te) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ve pham thuc ((day hanh) or (duy khanh)) de ((cua te) or (cuu tre))*.