Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
cac thuc » cach thuc, cac thu, can thuc
danh hai » dang hai, lanh hai, manh hai
su sach » so sach, vu sach
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, hoi cua
cua te » cua tu

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) or (((thu sach) OR (thuat sach)))) ty xang xa hoi. hieu va cac thuc va danh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (((thu sach) OR (thuat sach)))) ty xang xa hoi. hieu va cac thuc va danh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (((thu sach) OR (thuat sach)))) ty xang xa hoi. hieu va cac thuc va danh hai cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (((thu sach) OR (thuat sach)))) ty xang xa hoi. hieu va cac thuc va danh hai cua te*.