Perhaps you should try some spelling variations:
cong thong » cong thuong, cong trong, dong thong
sach hang » sach han, sach nang, khach hang
doan hung » doan phuong, doanh chung, doanh nhung
hung minh » phung minh, chung minh, hung manh
giai cong » gia cong, giao cong, giai phong
tu sach » thu sach, su sach, te sach
hang ve » hang va, hanh ve, hang ke
ve giai » va giai, ve giao, de giai
ca me » cha me, ca ve
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach hang ve giai doan hung minh ) or ( tu sach ((ca me) or (ba me)) giai cong thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach hang ve giai doan hung minh ) OR ( tu sach ((ca me) OR (ba me)) giai cong thong tin )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach hang ve giai doan hung minh ) or ( tu sach ((ca me) or (ba me)) giai cong thong tin ))*.