Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
nam thuc » nam thuoc, am thuc, nam thu
thuc va » thuc vat, thuc dan, thuc day
thi lan » thi hanh, thi nang, thi lien
thi dan » thi doan, thi dai, chi dan
xay hoi » xa hoi, tay hoi, cay phoi
sach o » sach lo, sac o, sach y
o dang » xo dang, do dang, so dang
va anh » van anh, va danh, va hanh
vi cua » vai cua
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: thu sach o dang xay hoi. ((thi dan) or (thi lan)) nam thuc va anh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach o dang xay hoi. ((thi dan) OR (thi lan)) nam thuc va anh ((vi cua) OR (di cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach o dang xay hoi. ((thi dan) or (thi lan)) nam thuc va anh ((vi cua) or (di cua)) tre*.