Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cong hai » cong thai, cong ha, hoang hai
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cuc ban » cua ban, cac ban, duc ban
cuu ban » cuu van, cua ban, cuu san
danh di » danh du, xanh di, danh dien
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ((son hai) or (cong hai)). hieu va cam ((cuc ban) OR (cuu ban)) danh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((son hai) OR (cong hai)). hieu va cam ((cuc ban) OR (cuu ban)) danh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ((son hai) or (cong hai)). hieu va cam ((cuc ban) OR (cuu ban)) danh di cua triet*".