Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh cat » danh bat, hanh cat, danh cau
danh ca » dan ca, doanh cua, danh cho
hieu va » lieu va, hieu qua
su sach » vu sach
cao hoi » cau hoi, co hoi, cao hoc
so sach » so sanh, bo sach, co sach
va cham » va chat, va tham
soc va » hoc va, loc va, doc va
y nang » ky nang, ly nang, v nang

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)) y nang cao hoi. hieu va cham soc va ((danh cat) OR (danh ca)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang cao hoi. hieu va cham soc va ((danh cat) OR (danh ca)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang cao hoi. hieu va cham soc va ((danh cat) OR (danh ca)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang cao hoi. hieu va cham soc va ((danh cat) OR (danh ca)) cua triet*.