Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hinh thai » sinh thai, tinh thai, dinh thi
hang tai » hang va, dung 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: thuoc sach ty sang ((ma hoa) or (xa hoi)). hieu ve chao xu va ((hinh thai) or (hang tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty sang ((ma hoa) OR (xa hoi)). hieu ve chao xu va ((hinh thai) OR (hang tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty sang ((ma hoa) or (xa hoi)). hieu ve chao xu va ((hinh thai) or (hang tai)) cua tre*.