Perhaps you should try some spelling variations:
hanh khoa » hang khoa, anh khoa, hanh hoa
pho thong » he thong
sinh hoat » sinh hoc, sinh vat
hoc trong » hoc thuong, hoc tieng, dot trong
sach thi » sach thu, sach tai, sach thieu
thi thuc » thai thuc, thi thuy, tri thuc
khoa pho » khoa phu, khoa khoa, khoa phau
thu sinh » thu minh, thu kinh, thuoc sinh
hoat hoc » hoa hoc, hoat ho, khoa hoc
vu sach » vu bach, su sach, vu khach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu sach thi thuc hanh khoa pho thong ) or ( vu sach thi thu sinh hoat hoc trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu sach thi thuc hanh khoa pho thong ) OR ( vu sach thi thu sinh hoat hoc trong )).
• Adding a wildcard symbol may retrieve word variants: (( vu sach thi thuc hanh khoa pho thong ) or ( vu sach thi thu sinh hoat hoc trong ))*.