Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach tu » sach thu, cach tu, sach ty
hanh de » hanh ve, hanh kem
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
va cam » va cham, va cao, va cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach tu nang xa hoi. hieu ((va cam) OR (va cac)) thuc vat ((danh di) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach tu nang xa hoi. hieu ((va cam) OR (va cac)) thuc vat ((danh di) OR (hanh de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach tu nang xa hoi. hieu ((va cam) OR (va cac)) thuc vat ((danh di) or (hanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc sach tu nang xa hoi. hieu ((va cam) OR (va cac)) thuc vat ((danh di) or (hanh de)) cua tre*.