Perhaps you should try some spelling variations:
thanh hoc » thanh hoa, than hoc, thanh ho
thu sach » thuat sach, thuoc sach, thu hoach
thi lien » thi lan
xanh tai » hanh tai, anh tai, vanh tai
thi nang » thi cong, ki nang, thi hanh
tai cua » thai cua, tai cuc, tri cua
va xanh » va hanh, va danh, va anh
thi van » thi lan, thi hanh
nang xa » nang x, lang xa, nang ma
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet

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) or (tu sach)) thi nang xa hoi. ((thi van) or (thi lien)) thanh hoc va xanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) thi nang xa hoi. ((thi van) OR (thi lien)) thanh hoc va xanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) thi nang xa hoi. ((thi van) or (thi lien)) thanh hoc va xanh tai cua tre*.