Perhaps you should try some spelling variations:
tranh thuoc » thanh phuoc, trang thuc, hanh thuoc
thuat canh » thuat lanh, thuat cong, thuat san
thuoc sach » hoc sach, nuoc sach, thuat sach
khoan phai » khong phai, khoan hoi, khoan nhoi
khoa phap » khong phap, hoa phan, hoc phap
khoa phau » hoa phan, khoa kham, khoa than

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat canh tranh thuoc sach ((((khoa phap) OR (khoa phau))) or (khoan phai)) thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat canh tranh thuoc sach ((((khoa phap) OR (khoa phau))) OR (khoan phai)) thong*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat canh tranh thuoc sach ((((khoa phap) OR (khoa phau))) or (khoan phai)) thong*".