Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
chan cac » chon cac, nhan cach, thanh cac
phan cac » nhan cach, phan dau, phan lap

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 ((thong cong) or (dung cong)) dan ((chan cac) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung cua ((thong cong) OR (dung cong)) dan ((chan cac) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trung cua ((thong cong) or (dung cong)) dan ((chan cac) or (phan cac))*.