Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cach thuc » anh thuc, cac thu
thi doanh » tri doanh, thi oanh, thi doan
khoa khoi » khoa hoi, khoa khoa, thoat khoi
sach tren » sach tien, sach tranh
tren vung » tren duong, ben vung, tren mang
vung bach » vung bac, vu bach, vung bao
bach khoa » anh khoa
pho thong » he thong
thuc thi » thuc thai, thuc thuc, thuc te
khoa pho » khoa phu, khoa khoa, khoa phau
tu cach » tu cac
te sach » toc sach
khong » phong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cach thuc thi doanh khoa khoi khong ) or ( te sach tren vung bach khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc thi doanh khoa khoi khong ) OR ( te sach tren vung bach khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc thi doanh khoa khoi khong ) or ( te sach tren vung bach khoa pho thong ))*.