Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
canh trinh » canh tranh, hanh trinh, canh tinh
thuat sach » thuat lanh
chuan dong » chua dong, chuan long, chuyen dong
cong thang » cong thanh, cang thang, cong thong
thuat san » thuat toan, thuat song, thuat lanh
dong cong » duong cong, dung cong, dang cong
thang ban » hang ban, tang ban, thanh ban
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thuat sach) OR (thuat san)) - canh trinh chuan dong cong thang ban cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thuat sach) OR (thuat san)) - canh trinh chuan dong cong thang ban cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thuat sach) OR (thuat san)) - canh trinh chuan dong cong thang ban cau*.