Perhaps you should try some spelling variations:
ha phuong » han phuong, hoa phuong, va phuong
dong cua » dung cua, cong cua, huong cua
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cam thu » nam thu, cac thu, ca thu
hoi cua » hoi chuc
cam tu » nam tu, dam tu, tam tu

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 xa hoi. hieu qua ((cam tu) OR (cam thu)) ha phuong ((hoi cua) or (dong cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu qua ((cam tu) OR (cam thu)) ha phuong ((hoi cua) OR (dong cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. hieu qua ((cam tu) OR (cam thu)) ha phuong ((hoi cua) or (dong cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu qua ((cam tu) OR (cam thu)) ha phuong ((hoi cua) or (dong cua)) tre*.