Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
chat duc » chat xuc, chat doc, chet duoc
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
ve chat » va chat, van chat
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) or (so sach)) ty nang x hoi. hieu ve chat duc van hanh lai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ty nang x hoi. hieu ve chat duc van hanh lai ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ty nang x hoi. hieu ve chat duc van hanh lai ((cua triet) or (su triet))*.