Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
van tuan » van quan, van ban, anh tuan
tuan lai » tuan tai, xuan lai, tuong lai
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau
su van » tu van, vu van

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 ky nang ((xa hoi) or (ma hoa)). ((hieu ve) or (hieu qua)) cao su van tuan lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((xa hoi) OR (ma hoa)). ((hieu ve) OR (hieu qua)) cao su van tuan lai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((xa hoi) or (ma hoa)). ((hieu ve) or (hieu qua)) cao su van tuan lai cua triet*.