Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
thuc cay » thuc can, thuc cao, thuc xay
su sach » so sach, vu sach
xanh di » danh di, vanh dai, xanh tai
va nham » va cham, va tham, va nha
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
sach v » sach va, sach y, sach 2
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 v ((nang ma) or (tang ma)) hoi. lieu va nham ((thuc cay) OR (thuc day)) xanh di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang ma) OR (tang ma)) hoi. lieu va nham ((thuc cay) OR (thuc day)) xanh di cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((nang ma) or (tang ma)) hoi. lieu va nham ((thuc cay) OR (thuc day)) xanh di cua su".
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang ma) or (tang ma)) hoi. lieu va nham ((thuc cay) OR (thuc day)) xanh di cua su*.