Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
dong thong » thong thong, nong thon, dong thanh
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
dong dong » dong duong, cong dong, dung dong
cong han » cong hoan, cong nhan, cong khan
han ap » han tap, khan ap, dan ap

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 sach - thanh ((trung cua) OR (trung tuan)) ((dong dong) or (dong thong)) cong han ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung cua) OR (trung tuan)) ((dong dong) OR (dong thong)) cong han ap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((trung cua) OR (trung tuan)) ((dong dong) or (dong thong)) cong han ap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung cua) OR (trung tuan)) ((dong dong) or (dong thong)) cong han ap*.