Perhaps you should try some spelling variations:
tinh lap » trinh lap, tinh lao, dinh lap
dua tren » dung tren
cau treo » cau theo, cau tren, cau triet
te sach » toc sach
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va tinh » may tinh
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa

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 y tang ma hoi. hieu ve pham duc va tinh lap ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. hieu ve pham duc va tinh lap ((dua tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoi. hieu ve pham duc va tinh lap ((dua tren) or (cau treo))*.