Perhaps you should try some spelling variations:
quan khao » luan khao, qua khao, quang khai
khao cuu » cham cuu, chao chu, kho cua
van quan » van ban
cuu tre » cua tre, cau tren, cau treo
vu cham » vu kham, tu cham, qua cham
duc van » duc va, duc tan, duc manh
va cham » va chat, va tham
ky tang » ky nang, ky dang, kho tang
ve cham » ve chat, ve chim, viet cham
tang xa » trang xa, tang ma, lang xa
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky tang xa hoi. hieu ((((ve cham) or (va cham))) or (vu cham)) duc van quan khao cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky tang xa hoi. hieu ((((ve cham) OR (va cham))) OR (vu cham)) duc van quan khao cuu tre.
• Adding a wildcard symbol may retrieve word variants: su cac ky tang xa hoi. hieu ((((ve cham) or (va cham))) or (vu cham)) duc van quan khao cuu tre*.