Perhaps you should try some spelling variations:
doanh khoan » doanh hoan, doanh nhan, doanh phan
phau thong » phap thong, khau thong, phan thong
doanh khoa » toan khoa
sach trien » sach tien, sach tren, sach thieu
khoa phau » hoa phan, khoa kham, khoa than
trien tri » trien thi, tien tri, trieu thi
khoan hoi » khoan nhoi, khoa hoi, khoa hoc
hoi khong » khoi khong, hoa khong, noi khong
sach tri » sach tai, sach tren, sach truc
le doanh » ly doanh, le danh, le doan
tu sach » thu sach, su sach, te sach
tri le » thi le, tri lieu

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 tri le doanh khoa phau thong ) or ( tu sach trien tri doanh khoan hoi khong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri le doanh khoa phau thong ) OR ( tu sach trien tri doanh khoan hoi khong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri le doanh khoa phau thong ) or ( tu sach trien tri doanh khoan hoi khong ))*.