Perhaps you should try some spelling variations:
khanh toan » thanh toan, khanh thanh, khanh thuan
cau theo » cau thi, cau tao
toan cau » toan cao, toan ban, toan tap
quoc ban » quoc bao, quoc lan, quoc quan
xuc ban » duc ban, cuc ban, xuat ban
te sach » toc sach
tai hoi » tai khoi, tai hai, tai hoe
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((tai hoi) or (dai hoi)). hieu ve cam ((xuc ban) OR (quoc ban)) khanh toan cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((tai hoi) OR (dai hoi)). hieu ve cam ((xuc ban) OR (quoc ban)) khanh toan cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((tai hoi) or (dai hoi)). hieu ve cam ((xuc ban) OR (quoc ban)) khanh toan cau theo".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((tai hoi) or (dai hoi)). hieu ve cam ((xuc ban) OR (quoc ban)) khanh toan cau theo*.