Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
sinh lao » tinh lao, sinh lam, sinh vat
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van 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 - hinh ((sinh lao) OR (sinh ly)) truong cong dan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - hinh ((sinh lao) OR (sinh ly)) truong cong dan ((toan cao) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - hinh ((sinh lao) OR (sinh ly)) truong cong dan ((toan cao) or (toan ban))*.