Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
chuan duong » chuong duong, chuyen duong, tuan duong
canh trinh » canh tranh, hanh trinh, canh tinh
duong cong » dung cong, luong cong, duong trong
cong dang » cong dong, cong dan, cong dung
hoc dieu » hoc thieu, hoc hien
dang ran » dang tran, dang van, dang dan
ran cau » van cau, ban cau, can 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 dieu hanh - canh trinh chuan duong cong dang ran cau~.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - canh trinh chuan duong cong dang ran cau*.