Perhaps you should try some spelling variations:
phong thong » thong thong, phong khong, phong trong
thanh trung » thanh tung
phong chong » thong thong
trung tuan » trung thanh, trung tam, tran tuan
theo sach » thuoc sach, te sach, theo lich
bieu toan » hieu toan, kiem toan, bien soan
toan tap » toan ban

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 (chinh sach)) - thanh trung tuan ((phong thong) or (phong chong)) bieu toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (chinh sach)) - thanh trung tuan ((phong thong) OR (phong chong)) bieu toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chinh sach)) - thanh trung tuan ((phong thong) or (phong chong)) bieu toan tap*.