Perhaps you should try some spelling variations:
sach vaya » sach va, sach hay, sach nay
hieu van » hieu va, thien van, lieu va
sach vay » sach va, sach hay, sach nay
hanh di » hanh vi, hanh de, hang di
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
lo dan » loi dan, co dan, lo van
le dan » ke dan
di cua » dai cua, doi cua, de cua
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: thuat ((sach vay) or (sach vaya)) nang xa hoi. hieu van cam ((lo dan) OR (le dan)) hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach vay) OR (sach vaya)) nang xa hoi. hieu van cam ((lo dan) OR (le dan)) hanh di cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach vay) or (sach vaya)) nang xa hoi. hieu van cam ((lo dan) OR (le dan)) hanh di cua te*".