Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
thanh tung » thanh cong
hieu cach » hieu cac, chieu sach, hieu ca
tong cong » trong cong, cong cong, dung cong
tung cua » trung cua, tuong cua, dung cua
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan dau, phan van
phan lap » phan dau

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