Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
hieu van » hieu va, thien van, lieu va
van chao » van chat, van hao, van cho
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu
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: tu sach ty hang ((ma hoa) or (xa hoi)). hieu van chao xu va hanh thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty hang ((ma hoa) OR (xa hoi)). hieu van chao xu va hanh thai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang ((ma hoa) or (xa hoi)). hieu van chao xu va hanh thai ((cua tre) or (cua te))*.