Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
truong cua » truong ca, truong quan, truong cao
khong dung » thong dung, phuong dung, cuong dung
hoc thieu » toc thieu, hoc hien
trung cua » trung tuan, trung cap, dung cua
dan chan » dan gian, dan ca
van chat » cao chat

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 (truong cua)) khong dung ((dan chan) OR (van chat)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung cua) OR (truong cua)) khong dung ((dan chan) OR (van chat)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((trung cua) or (truong cua)) khong dung ((dan chan) OR (van chat)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung cua) or (truong cua)) khong dung ((dan chan) OR (van chat)) cau*.