Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
vu sach » vu bach, su sach, vu khach
danh tu » anh tu, doanh thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
thuc va » thuc vat, thuc dan
cua tu » cua tuc, cua su, cua cu
y xang » ty xang

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 y xang xa hoi. hieu va pham ((thuc va) OR (thuc day)) danh tu ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y xang xa hoi. hieu va pham ((thuc va) OR (thuc day)) danh tu ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y xang xa hoi. hieu va pham ((thuc va) OR (thuc day)) danh tu ((cua te) or (cua tu))*".