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