Perhaps you should try some spelling variations:
khoan khau » khoanh khac, khoa kham, khoa phau
tri truoc » tri thuoc, tri thuc, gi truoc
truoc cac » truoc cach, truoc cang, truoc cuoc
khau cong » khu cong, khau tong, khach cong
sach hien » sach tien, sach thieu, cach thien
hach toan » thanh toan, manh toan
thu sach » tu sach, thuat sach, thuoc sach
sach tri » sach tai, sach tren, sach truc
so sach » so sanh, bo sach, co sach
hien tu » khien tu, dien tu
tu hach » tu hanh, tu cach, tu sach
toan he » toan ho, toan ke, toan ve
thong » trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sach tri truoc cac khoan khau cong ) or ( so sach hien tu hach toan he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach tri truoc cac khoan khau cong ) OR ( so sach hien tu hach toan he thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach tri truoc cac khoan khau cong ) or ( so sach hien tu hach toan he thong ))*.