Perhaps you should try some spelling variations:
sach tham » sach nha
cua nuoc » cua quoc, cua nguoi, cua thuoc
tinh doi » trinh doc, trinh do, tinh hoc
nam thuc » nam thuoc, am thuc, nam thu
dang xay » dang van, van xay
xay hoi » xa hoi, tay hoi, cay phoi
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
doi cua » dai cua, hoi cua
va nam » van nam, ha nam, va nay

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 ty) or (sach tham)) dang xay hoi. hieu va nam thuc va tinh doi cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach tham)) dang xay hoi. hieu va nam thuc va tinh doi cua nuoc.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) or (sach tham)) dang xay hoi. hieu va nam thuc va tinh doi cua nuoc*.