Perhaps you should try some spelling variations:
khoan phai » khong phai, khoa phau, khoan hoi
than thong » than thuong, toan thong, tran thong
phai cong » phan cong, pham cong, thai cong
sach pham » sach tham, sach phat, sach phap
khoa than » khoa luan, hoa thai, hoa tan
dao thuc » dan thuc, dao tuc, do thuc
thuc cac » thuc cach, tuc cac, phuc cac
anh khoa » doanh khoa, hang khoa
te lanh » te danh, te lan, tu lanh
te sach » toc sach
pham tu » phan tu, pham thi, pham tai
tu anh » tu hanh, tu manh, thu anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te lanh dao thuc cac khoan phai cong ) or ( te sach pham tu anh khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te lanh dao thuc cac khoan phai cong ) OR ( te sach pham tu anh khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( te lanh dao thuc cac khoan phai cong ) or ( te sach pham tu anh khoa than thong ))*.