Perhaps you should try some spelling variations:
hieu quan » hieu qua, lieu quan, thien quan
quan pham » tuan pham, quan phap, quang phat
thanh tai » thanh hai, thanh toan, doanh tai
toan hoc » toan khoa, van hoc, hoa hoc
va thanh » gia thanh, ban thanh, va tinh
mon hoc » dong hoc
tai cua » thai cua, tai cuc, tri cua
tu can » tu cac, thu canh
tu ban » thu ban, te ban
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: ((tu can) or (tu ban)) ky nang ((mon hoc) or (toan hoc)). hieu quan pham duc va thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu can) OR (tu ban)) ky nang ((mon hoc) OR (toan hoc)). hieu quan pham duc va thanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu can) or (tu ban)) ky nang ((mon hoc) or (toan hoc)). hieu quan pham duc va thanh tai cua te*.