Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
cu triet » cua triet, cau triet, su triet
ly nang » ky nang, ly hang, ly vang
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va danh, ban hanh
cong cu » chung cu
y nang » ky nang, v nang, may nang
va hoc » van hoc
nuoc » quoc, duoc, ngoc

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 ((y nang) OR (ly nang)) cao hoi. lieu va hoc nuoc ((va hanh) or (va thanh)) cong cu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ly nang)) cao hoi. lieu va hoc nuoc ((va hanh) OR (va thanh)) cong cu triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (ly nang)) cao hoi. lieu va hoc nuoc ((va hanh) or (va thanh)) cong cu triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (ly nang)) cao hoi. lieu va hoc nuoc ((va hanh) or (va thanh)) cong cu triet*.