Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cap nuoc » dat nuoc
ban hanh » ban hang
dang xay » dang van, van xay
vai cua » dai cua, hai cua, lai cua
va kinh » va tinh, qua kinh
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve cap » ve cac, le cap, ve cai
y dang » ky dang, 2 dang, _ dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu hoach)) y dang xay hoi. hieu ve cap nuoc ((va kinh) or (ban hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) y dang xay hoi. hieu ve cap nuoc ((va kinh) OR (ban hanh)) vai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) y dang xay hoi. hieu ve cap nuoc ((va kinh) or (ban hanh)) vai cua triet*.