Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
nhung dong » nhung don, nhung cong, nhung dung
theo sach » thuoc sach, te sach, theo lich
hieu cach » hieu cac, chieu sach, hieu ca
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
dong sang » dong bang, dong san, dong nang
sang than » cang thang, dang thanh, sang tao
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((theo sach) or (thien hach))) or (hieu cach)) - thanh trung cua nhung dong sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((theo sach) OR (thien hach))) OR (hieu cach)) - thanh trung cua nhung dong sang than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((theo sach) or (thien hach))) or (hieu cach)) - thanh trung cua nhung dong sang than cau*.