Perhaps you should try some spelling variations:
nha thuc » nhan thuc, nha thuoc, nham thuc
cay xanh » cay lanh, cao anh, day manh
tang van » dang van, hoang van, trong van
xa xanh » xa thanh, mau xanh, rau xanh
van hoi » van hoa, van hoc, van hoe
va nha » va nho, ve nha
di cua » dai cua, doi cua, de cua
cua su » qua su

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 2) or (sach y)) tang van hoi. lieu va nha thuc ((xa xanh) OR (cay xanh)) di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach 2) OR (sach y)) tang van hoi. lieu va nha thuc ((xa xanh) OR (cay xanh)) di cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach 2) or (sach y)) tang van hoi. lieu va nha thuc ((xa xanh) OR (cay xanh)) di cua su".
• Adding a wildcard symbol may retrieve word variants: su ((sach 2) or (sach y)) tang van hoi. lieu va nha thuc ((xa xanh) OR (cay xanh)) di cua su*.