Perhaps you should try some spelling variations:
bach khang » bac thang, bach dang
thuc bach » truc bach, thuc cach, thuoc sach
chuc danh » chuc nganh, thuc hanh, chuc nang
danh khoa » doanh khoa, anh khoa, danh hoa
doc sach » hoc sach, toc sach, nuoc sach
sach tai » sach bai, sach tham, sach dao
tai thuc » thai thuc, tri thuc, dai thuc
khang he » khong he, khang kho, hang ha
tu lanh » tu hanh, tu lenh, tu manh
lanh da » lanh dao, lanh va, danh dau
da chuc » di chuc, don chuc, gia chuc
khoa he » hoa he, khoa hoc, khong he

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( doc sach tai thuc bach khang he thong ) or ( tu lanh da chuc danh khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( doc sach tai thuc bach khang he thong ) OR ( tu lanh da chuc danh khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( doc sach tai thuc bach khang he thong ) or ( tu lanh da chuc danh khoa he thong ))*.