Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
vu sach » vu bach, vu khach
su sach » so sach
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
cuc tre » duc tre, cua tre, cuu tre
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: ((((vu sach) or (su sach))) or (thu sach)) ky nang cao hoc. hieu ve cam cuc ban thanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu sach) OR (su sach))) OR (thu sach)) ky nang cao hoc. hieu ve cam cuc ban thanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((((vu sach) or (su sach))) or (thu sach)) ky nang cao hoc. hieu ve cam cuc ban thanh tai cuc tre*.