Perhaps you should try some spelling variations:
pham huu » pham duc, pham duy, phan huy
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va hanh » van hanh, va thanh, va danh
huu va » cuu va, tuu va
lam va » nam va, dam va, lam ha
dam ha » nam ha, dam phan
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: su sach ty nang x hoi. hieu ve pham huu va hanh ((lam va) or (dam ha)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ve pham huu va hanh ((lam va) OR (dam ha)) thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ve pham huu va hanh ((lam va) or (dam ha)) thiet*.