Perhaps you should try some spelling variations:
bang khoan » hang khoa, bang nhan, dang khoa
tuong bang » cuong bang, muong bang, trong bang
khoan phai » khong phai, khoa phau, khoan hoi
phai thong » phap thong, phai tuong, phan thong
cac khong » cac phong, cat khong, cac phuong
khong khi » khong he
khi thong » khi phong, khi tuong, thi thuong
nha tuong » nha truong, nhan tuong, nha thong
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc cac » thuc cach, tuc cac, phuc cac
te sach » toc sach
tu sach » thu sach, su sach, tu cach

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 dao thuc cac khong khi thong ) or ( tu sach nha tuong bang khoan phai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach dao thuc cac khong khi thong ) OR ( tu sach nha tuong bang khoan phai thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach dao thuc cac khong khi thong ) or ( tu sach nha tuong bang khoan phai thong ))*.