Perhaps you should try some spelling variations:
phai phuong » phai nhuong, phap phuong, hai phong
sach trien » sach tien, sach tren, sach thieu
khoan toan » khoan thanh, khoa than, hoa toan
khoan phai » khong phai, khoa phau, khoan hoi
trien tuc » trien thuc, trien thuoc, thien tu
dac khoan » dac khoa, dai khoang, da khoa
sach tri » sach tai, sach tren, sach truc
tu sach » thu sach, su sach, te sach
tuc cac » tu cac, tich cac
cua dac » chua dac, cua cac, cua dan

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 trien tuc cac khoan toan thong ) or ( tu sach tri cua dac khoan phai phuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach trien tuc cac khoan toan thong ) OR ( tu sach tri cua dac khoan phai phuong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach trien tuc cac khoan toan thong ) or ( tu sach tri cua dac khoan phai phuong ))*.