Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va thiet, va trien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
duc tran » duc tan, duc toan, duc tren
ve chat » va chat, van chat
tu sach » su sach, te sach, tu cach
tu tong » tu tuong, tu trong, tu dong
ve cham » va cham, vu cham, ve chim
tong x » tong xi, thong xu, trong xu
hai va » hai van, thai va, hoi va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) tu tong x hoi. hieu ((ve cham) or (ve chat)) duc tran thanh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tu tong x hoi. hieu ((ve cham) OR (ve chat)) duc tran thanh hai va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) tu tong x hoi. hieu ((ve cham) or (ve chat)) duc tran thanh hai va triet*.