Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
sach duy » sach dung, sach duoc, sach dao
hanh tai » hang tai, han tai, hinh tai
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
soc va » hoc va, loc va, doc va
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: tu sach duy vat ((mai hoi) or (ma hoa)). hieu ve cham soc va ((hanh tai) OR (thanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach duy vat ((mai hoi) OR (ma hoa)). hieu ve cham soc va ((hanh tai) OR (thanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach duy vat ((mai hoi) or (ma hoa)). hieu ve cham soc va ((hanh tai) OR (thanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach duy vat ((mai hoi) or (ma hoa)). hieu ve cham soc va ((hanh tai) OR (thanh tai)) cua te*.