Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh lap » thanh san, phan lap, thanh hai
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
ve pham » vi pham, v pham, ve phan
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lap ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lap ((dung tren) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lap ((dung tren) or (cuu tre))*".