Perhaps you should try some spelling variations:
ngon thanh » ngoc thanh, ngo thanh, nguoi thanh
thanh vai » thanh hai, thanh van, thanh tai
duc ngon » duc ngoc, dung ngon, duoi ngon
so sach » so sanh, bo sach, co sach
ty hang » ly hang, thi hang, thu hang
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
vai cua » dai cua, hai cua, lai cua
ve cac » va cac, vien cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty hang) or (ty xang)) xa hoi. hieu ve cac duc ngon thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty hang) OR (ty xang)) xa hoi. hieu ve cac duc ngon thanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ((ty hang) or (ty xang)) xa hoi. hieu ve cac duc ngon thanh vai cua te*.