Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
truong cao » truong dai
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sach - thanh ((trung tuan) or (truong cao)) thong cong tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh ((trung tuan) OR (truong cao)) thong cong tan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - thanh ((trung tuan) or (truong cao)) thong cong tan khan cap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - thanh ((trung tuan) or (truong cao)) thong cong tan khan cap*.