Perhaps you should try some spelling variations:
su sach » so sach, vu sach
xanh di » danh di, vanh dai, xanh tai
danh vi » hanh vi, dinh vi, danh di
ve pham » vi pham, v pham, ve phan
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
dan lap » phan lap, dan luan
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 ky ((dan lap) or (nang ma)) hai. hieu ve pham duc va ((danh vi) or (xanh di)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((dan lap) OR (nang ma)) hai. hieu ve pham duc va ((danh vi) OR (xanh di)) cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((dan lap) or (nang ma)) hai. hieu ve pham duc va ((danh vi) or (xanh di)) cua te*.