Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
kv nang » ky nang, ki nang, ke nang
v nang » va nang, vu nang, van nang
bac tu » ban tu, tac tu, cac tu

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 ((v nang) or (kv nang)) xa hoi. hieu qua ((bac tu) or (bach tuoc)) va hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (kv nang)) xa hoi. hieu qua ((bac tu) OR (bach tuoc)) va hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (kv nang)) xa hoi. hieu qua ((bac tu) or (bach tuoc)) va hanh tai cua triet*.