Perhaps you should try some spelling variations:
tra nang » thi nang, kha nang, da nang
cac duc » cac du, cao duc, cac dac
doi cua » dai cua, hoi cua
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
su sach » vu sach
hieu ve » hieu va, hieu van
so sach » so sanh, bo sach, co sach
ve cac » va cac, vien cac
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) or (so sach)) tra nang x hoi. hieu ve cac duc va hanh ((vai cua) or (doi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) tra nang x hoi. hieu ve cac duc va hanh ((vai cua) OR (doi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) tra nang x hoi. hieu ve cac duc va hanh ((vai cua) or (doi cua)) triet*.