Perhaps you should try some spelling variations:
toan thanh » tran thanh, hoan thanh, toan thang
thanh ban » thanh san, thanh van, thanh bac
cao tang » cao dang
duc toan » duc tan, duc ton, duc hoan
cuu tre » cua tre, cau tren, cau treo
ban cuu » ban cua, ban cau, ban muu
su xac » pu xac, su cac
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, 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 xac ((kho tang) OR (cao tang)) xa hoi. hieu ((ve cam) or (va cam)) duc toan thanh ban cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ((kho tang) OR (cao tang)) xa hoi. hieu ((ve cam) OR (va cam)) duc toan thanh ban cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ((kho tang) OR (cao tang)) xa hoi. hieu ((ve cam) or (va cam)) duc toan thanh ban cuu tre".
• Adding a wildcard symbol may retrieve word variants: su xac ((kho tang) OR (cao tang)) xa hoi. hieu ((ve cam) or (va cam)) duc toan thanh ban cuu tre*.