Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, thien tinh, lieu tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong cong » cong dong, trong cong, dung cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 ((thieu tinh) or (chieu tinh)) - hanh ((trung cua) OR (trung cap)) cong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (chieu tinh)) - hanh ((trung cua) OR (trung cap)) cong cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) or (chieu tinh)) - hanh ((trung cua) OR (trung cap)) cong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (chieu tinh)) - hanh ((trung cua) OR (trung cap)) cong cong tan toan cao*.