Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhanh lang » nhanh quang, nhanh thang, nhan dang
nhung cong » dung cong, thong cong, hang cong
hanh tung » thanh tung, manh tung, hanh dung
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban

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: theo chieu tinh - ((hanh tung) OR (nhanh lang)) va nhung cong tan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - ((hanh tung) or (nhanh lang)) va nhung cong tan ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - ((hanh tung) or (nhanh lang)) va nhung cong tan ((toan cao) OR (toan tap))*.