Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, anh thai
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
ve chao » ve chat, ve cham, ve cho
hieu ve » hieu va, hieu van
ty sang » ty xang, ty hang, duy sang
cua tre » cua te, cuu tre, cua triet
xu va » xu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty sang ((ma hoa) or (xa hoi)). hieu ve chao xu va ((hanh thai) OR (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty sang ((ma hoa) OR (xa hoi)). hieu ve chao xu va ((hanh thai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty sang ((ma hoa) or (xa hoi)). hieu ve chao xu va ((hanh thai) OR (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ty sang ((ma hoa) or (xa hoi)). hieu ve chao xu va ((hanh thai) OR (hanh tai)) cua tre*.