Perhaps you should try some spelling variations:
da phuong » dia phuong, dan phuong, day phuong
nang cau » nang cao, hang cau, nang dau
xa huong » xa phuong, va huong, xa muong
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve chai » ve cai, ve chat, va chai
chai tu » cai tu, choi tu, chay tu
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang cau hoi. hieu ve chai tu ((xa huong) or (da phuong)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang cau hoi. hieu ve chai tu ((xa huong) OR (da phuong)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang cau hoi. hieu ve chai tu ((xa huong) or (da phuong)) doi cua tre*.