Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dung xay » dang xay, dung may, dung tay
hanh di » hanh vi, hanh de, hang di
vu sach » vu bach, vu khach
xay hoi » xa hoi, tay hoi, cay phoi
ly dung » ly dong, xay dung, ly khung
su sach » so sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

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) OR (su sach)) ly dung xay hoi. hieu va cam ((duc va) or (thuc vat)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ly dung xay hoi. hieu va cam ((duc va) OR (thuc vat)) hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ly dung xay hoi. hieu va cam ((duc va) or (thuc vat)) hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) ly dung xay hoi. hieu va cam ((duc va) or (thuc vat)) hanh di cua triet*.