Perhaps you should try some spelling variations:
cho chuong » theo chuong, cho cong, cho truong
sinh nghe » sinh ngheo, tinh nghe, vinh nghe
hang khoa » dung khoa
pho thong » he thong
thu canh » thuc hanh, thu cong, thu ban
thu sinh » thu minh, thu kinh, thuoc sinh
nghe cho » nghe che, nghe co, nghe cao
sach tri » sach tai, sach tren, sach truc
tri ngan » tai ngan, tri nhan, thi ngan
khoa pho » khoa phu, khoa khoa, khoa phau
canh tu » anh tu, danh tu, hanh tu
tu sach » thu sach, su sach, te sach
tu thu » tu tu, vu thu, tieu thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu canh tu thu sinh nghe cho chuong ) or ( tu sach tri ngan hang khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu canh tu thu sinh nghe cho chuong ) OR ( tu sach tri ngan hang khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu canh tu thu sinh nghe cho chuong ) or ( tu sach tri ngan hang khoa pho thong ))*.