Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh van » trinh han, trinh quan, trinh toan
hoc tien » hoc tieng, hoc hien, hoc vien
van dang » van dong, van dung, van nang
phat cac » phan cac, pha cac, phap cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien thanh - canh trinh van dang ((cong tac) or (cong ty)) phat cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien thanh - canh trinh van dang ((cong tac) OR (cong ty)) phat cac.
• Adding a wildcard symbol may retrieve word variants: hoc tien thanh - canh trinh van dang ((cong tac) or (cong ty)) phat cac*.