Perhaps you should try some spelling variations:
da phuong » dia phuong, dan phuong, day phuong
xa huong » xa phuong, va huong, xa muong
co sach » bo sach, cuon sach, hoc sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky nang ma hoa. hieu ((ve cam) OR (ve cac)) xuc ((xa huong) or (da phuong)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ky nang ma hoa. hieu ((ve cam) OR (ve cac)) xuc ((xa huong) OR (da phuong)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky nang ma hoa. hieu ((ve cam) OR (ve cac)) xuc ((xa huong) or (da phuong)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: co sach ky nang ma hoa. hieu ((ve cam) OR (ve cac)) xuc ((xa huong) or (da phuong)) dai cua tre*.