Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tram » hanh trang, thanh tran, thanh tra
tuong tac » cong tac, luong tai, tuong lai
ho chieu » theo chieu, hoc thieu, doi chieu
hanh tam » thanh tam, nhanh tam, hanh lam
tong tac » trong tac, cong tac, tong tap
phan tap » phan lap, han tap, pha tap
van han » van hanh, van phan, van nhan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((hanh tram) OR (hanh tam)) van han ((tong tac) OR (tuong tac)) phan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - ((hanh tram) or (hanh tam)) van han ((tong tac) OR (tuong tac)) phan tap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((hanh tram) or (hanh tam)) van han ((tong tac) OR (tuong tac)) phan tap*.