Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
dua tren » dung tren
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
ve pham » vi pham, v pham, ve phan
sach ly » sach y, sach lo, sach ty
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: te sach ly ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lai ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lai ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang ma) OR (tang ma)) hoi. hieu ve pham duc va thanh lai ((dua tren) or (cuu tre))*.