Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
trong danh » trong doanh, truong danh, trong anh
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
tuan cau » toan cau, quan cau, tuan cu

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