Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh te » thanh ve, thanh de, thanh le
cham luc » cham soc, nhan luc, cham cuu
hien tu » khien tu, dien tu
luc van » luoc van, luu van, duc van
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach kem
hieu tu » chieu tu, hieu tuc, lieu tu
tang ha » lang ha, tang ma, trung ha
sach ty » sach y, sach tu, sach thu
te cuu » te cua, te cau, tu cuu

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 ky) or (sach ty)) tang ha noi. ((hieu tu) or (hien tu)) cham luc van thanh te cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) tang ha noi. ((hieu tu) OR (hien tu)) cham luc van thanh te cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach ty)) tang ha noi. ((hieu tu) or (hien tu)) cham luc van thanh te cuu tre*.