Perhaps you should try some spelling variations:
dua tren » dung tren
dung doi » huong doi, dung tai, dung co
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xa dung » xay dung, xa dong, va dung
cam tuc » cam xuc, cam tu, nam thuc
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((nang xa) or (nang x)) hoi. hieu ve cam tuc xa dung doi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (nang x)) hoi. hieu ve cam tuc xa dung doi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (nang x)) hoi. hieu ve cam tuc xa dung doi ((dua tren) or (cuu tre))*.