Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh hai » thanh phan, thanh hoa, thanh san
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
cam luc » cam xuc, cau luc
qua cam » qua cham, qua cac, qua ca
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sac ky)) nang xa hoi. hieu qua cam luc va thanh hai ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sac ky)) nang xa hoi. hieu qua cam luc va thanh hai ((dung tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sac ky)) nang xa hoi. hieu qua cam luc va thanh hai ((dung tren) or (cuu tre))*.