Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung tuan » trung thanh, tran tuan, truong thanh
thong vang » thong van, thong mang, thong vung
vang toan » van toan, dang toan, quang toan
toan tap » toan ban
ha tinh » va tinh, may tinh

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) or (ha tinh)) - hanh ((trung tuan) OR (trung tam)) khong thong vang toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (ha tinh)) - hanh ((trung tuan) OR (trung tam)) khong thong vang toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (ha tinh)) - hanh ((trung tuan) OR (trung tam)) khong thong vang toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (ha tinh)) - hanh ((trung tuan) OR (trung tam)) khong thong vang toan tap*.