Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
cau tren » cu tren, dau tren, ca tren
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
hoc van » hoc dan, hoc va, hoc vat
van anh » van thanh, tuan anh, van minh
sac ky » cac ky, sai ky
anh vi » hanh vi, anh va, anh ve
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sac ky)) nang xa hoi. lieu va cham hoc van anh vi ((cau tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang xa hoi. lieu va cham hoc van anh vi ((cau tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) nang xa hoi. lieu va cham hoc van anh vi ((cau tren) or (cua te))*.