Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
va triet » va trien, ve triet, cua triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, te sach, tu cach
duc van » duc va, duc tan, duc manh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
x hoi » xa hoi, o hoi, x ho
thiet » thieu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve cham duc van hanh lai ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ty nang x hoi. hieu ve cham duc van hanh lai ((va triet) OR (va thiet))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang x hoi. hieu ve cham duc van hanh lai ((va triet) OR (va thiet))*.