Perhaps you should try some spelling variations:
sanh trinh » hanh trinh, anh trinh, sinh trinh
trinh thuc » trinh tu, trinh thi
khoan nuoi » khoan nhoi, chan nuoi, khoa noi
nuoi trong » nuoc trong, ngoai trong, bui trong
pho thong » he thong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa phu, khoa khoa, khoa phau
sanh tai » sang tai, hanh tai, anh tai
tai thuc » thai thuc, tri thuc, dai thuc
thuc cac » thuc cach, tuc cac, phuc cac
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh trinh thuc anh khoa pho thong ) or ( so sanh tai thuc cac khoan nuoi trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh trinh thuc anh khoa pho thong ) OR ( so sanh tai thuc cac khoan nuoi trong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh trinh thuc anh khoa pho thong ) or ( so sanh tai thuc cac khoan nuoi trong ))*.