Perhaps you should try some spelling variations:
lang de » vang de, lang du, lang ke
dang de » dang deo, dung de, dang do
cach tu » cach thuc
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, sach ty, sach uu
qua ca » qua cac, qua cua, qua cai
ca duc » cao duc, cua duc, ca dua
cua te » cua tu

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 tu) or (cach tu)) nang xa hoi. hieu qua ca duc va ((lang de) OR (dang de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (cach tu)) nang xa hoi. hieu qua ca duc va ((lang de) OR (dang de)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) or (cach tu)) nang xa hoi. hieu qua ca duc va ((lang de) OR (dang de)) cua te*".