Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
ve cham » va cham, ve chat, vu cham
hai van » thai van, ha van, hai tan
duc ban » duc tan, duc van, dua ban
su sach » so sach, vu sach
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky tang) or (ky dang)) xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh hai van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky tang) OR (ky dang)) xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh hai van triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky tang) or (ky dang)) xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh hai van triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky tang) or (ky dang)) xa hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh hai van triet*.