Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh te » thanh ve, thanh de, thanh le
trung ha » trung hoc, trung tam, trung cap
thu cac » tu cac, thu xac, thu cuc
cua tre » cua te, cuu tre, cua triet
tang ha » lang ha, tang ma, tang van
xu van » tu van, vu van, su van
te cua » tue cua, le cua, de cua
su cao » cu cao, vu cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu cac ky ((tang ha) OR (trung ha)) noi. hieu ((su cao) or (su co)) xu van thanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cac ky ((tang ha) OR (trung ha)) noi. hieu ((su cao) OR (su co)) xu van thanh te cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu cac ky ((tang ha) OR (trung ha)) noi. hieu ((su cao) or (su co)) xu van thanh te cua tre".
• Adding a wildcard symbol may retrieve word variants: thu cac ky ((tang ha) OR (trung ha)) noi. hieu ((su cao) or (su co)) xu van thanh te cua tre*.