Perhaps you should try some spelling variations:
sach kem » hanh kem
dang de » dang deo, dung de, dang do
danh de » hanh de, dan de, danh di
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
sac ky » cac ky, sai ky
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: tu ((sach kem) or (sac ky)) nang xa hoi. hieu ve cam xuc va ((danh de) OR (dang de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) nang xa hoi. hieu ve cam xuc va ((danh de) OR (dang de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach kem) or (sac ky)) nang xa hoi. hieu ve cam xuc va ((danh de) OR (dang de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) nang xa hoi. hieu ve cam xuc va ((danh de) OR (dang de)) cua tre*.