Perhaps you should try some spelling variations:
tieu trinh » tien trinh, tien thinh, trieu tinh
truong cua » truong ca, truong quan, truong cao
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trung cua » trung tuan, trung cap, dung cua
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai 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 ((lieu tinh) or (tieu trinh)) - hanh ((trung cua) OR (truong cua)) nhung cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (tieu trinh)) - hanh ((trung cua) OR (truong cua)) nhung cong tap toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((lieu tinh) or (tieu trinh)) - hanh ((trung cua) OR (truong cua)) nhung cong tap toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu tinh) or (tieu trinh)) - hanh ((trung cua) OR (truong cua)) nhung cong tap toan cao*.