Perhaps you should try some spelling variations:
nuoc duc » ngoc duc, nuoc cuc, duoc duoc
su sach » vu sach
tinh de » tinh da, sinh de, tinh he
va tinh » may tinh
va nuoc » va cuoc, ve nuoc, va duoc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
so sach » so sanh, bo sach, co sach
de cua » le cua, te cua, dieu cua

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 (so sach)) ky ((nang xa) or (nang x)) hoi. hieu va nuoc duc va tinh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky ((nang xa) OR (nang x)) hoi. hieu va nuoc duc va tinh de cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky ((nang xa) or (nang x)) hoi. hieu va nuoc duc va tinh de cua tre*.