Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
doi cua » dai cua, hoi cua
vu sach » vu bach, su sach, vu khach
ly vang » ly hang, ly van, ly quang
ly lanh » ly anh, ly hanh, ly danh
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ly lanh) or (ly vang)) xa hoi. hieu va cam ((duc va) or (thuc vat)) hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ly lanh) OR (ly vang)) xa hoi. hieu va cam ((duc va) OR (thuc vat)) hanh doi cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ly lanh) or (ly vang)) xa hoi. hieu va cam ((duc va) or (thuc vat)) hanh doi cua triet*.