Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
thu hoan » thi hoan, thu hoach, thu hien
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
van cam » van nam, van lam, van cau
vai cua » dai cua, hai cua, lai cua
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((thu hoan) or (thu ha)) xa hoi. hieu van cam ((xuc va) or (duc va)) hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((thu hoan) OR (thu ha)) xa hoi. hieu van cam ((xuc va) OR (duc va)) hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ((thu hoan) or (thu ha)) xa hoi. hieu van cam ((xuc va) or (duc va)) hanh vai cua triet*.