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