Perhaps you should try some spelling variations:
sang loai » dang loai, sang tai, hang loi
hieu sau » hieu suat, tieu su, hieu va
loai hoc » logic hoc, loai khoa, dai hoc
ky sang » ky nang, ky dang, ky tang
hieu su » tieu su, hieu so, hieu suat
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
tu san » thu san, tu ban, tu can
tuc va » thuc va, truc va, duc va
san ky » sang ky, van ky, dan ky
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky sang loai hoc. ((hieu su) OR (hieu sau)) chat ((tuc va) OR (tuc xa)) dan vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky sang loai hoc. ((hieu su) or (hieu sau)) chat ((tuc va) OR (tuc xa)) dan vai cua te~".
• Adding a wildcard symbol may retrieve word variants: tu san ky sang loai hoc. ((hieu su) or (hieu sau)) chat ((tuc va) OR (tuc xa)) dan vai cua te*.