Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung nhat » truong nhat, trong nhat, trung nhan
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trung hat » trung phat, trung hai, truong nhat
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 ha) or (((trung hat) OR (trung nhat)))) nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - hanh ((trung ha) OR (((trung hat) OR (trung nhat)))) nhung cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - hanh ((trung ha) or (((trung hat) OR (trung nhat)))) nhung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh ((trung ha) or (((trung hat) OR (trung nhat)))) nhung cong dan toan cao*.