Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh hai » thanh phan, thanh hoa, thanh san
tu sach » thu sach, te sach, tu cach
xuc ban » duc ban, cuc ban, quoc ban
cuc tre » duc tre, cua tre, cuu tre
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang cao hoc. hieu ve cam xuc ban ((thanh hai) or (thanh toan)) cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang cao hoc. hieu ve cam xuc ban ((thanh hai) OR (thanh toan)) cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang cao hoc. hieu ve cam xuc ban ((thanh hai) or (thanh toan)) cuc tre*.