Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
tan hang » tan khang, ban hang, van hang
hang hai » hoang hai, hang tai, thanh hai
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cuu tre, cua triet, dua tren
su sac » su sach, su cac, su xac
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 sac ((ky tang) OR (ky dang)) xa hoi. hieu ve cham duc tan hang hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky dang)) xa hoi. hieu ve cham duc tan hang hai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) OR (ky dang)) xa hoi. hieu ve cham duc tan hang hai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) OR (ky dang)) xa hoi. hieu ve cham duc tan hang hai ((cua tre) or (cua te))*.