Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
hang cong » dang cong, hang nong, bang cong
trung ha » trung hoc, trung cap
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu tinh - hanh ((trung tam) or (trung ha)) hang cong dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - hanh ((trung tam) OR (trung ha)) hang cong dan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh ((trung tam) or (trung ha)) hang cong dan ((toan tai) or (toan cao))*.