Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang hai » hoang hai, hang tai, thanh hai
ban hang » ngan hang
cua tre » cua te, cuu tre, dua tren
soc ban » hoc ban, coc ban, so ban
vu sach » vu bach, su sach, vu khach
va cham » va chat
lang xa » lang ha, dang xay, lang van
va tham » van tham, va thanh, va thuat

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban hang hai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban hang hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban hang hai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban hang hai ((cua tre) or (cua triet))*.