Perhaps you should try some spelling variations:
van phannh » van thanh, van hanh, van khanh
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, luan phan
phan xuc » phan duc, phan suc, phan quoc
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va hanh » van hanh, va thanh, va danh
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: tu sach ty nang x hoi. hieu van phan xuc ((va hanh) or (van phannh)) lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van phan xuc ((va hanh) OR (van phannh)) lai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu van phan xuc ((va hanh) or (van phannh)) lai su triet*.