Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
tham duc » pham duc, than duc, thach duc
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
tham du » thap du, tham do, pham duc
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
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 van ((tham duc) OR (tham du)) ban hanh lai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu van ((tham duc) OR (tham du)) ban hanh lai ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu van ((tham duc) OR (tham du)) ban hanh lai ((cua triet) or (va triet))*".