Perhaps you should try some spelling variations:
sach vaya » sach va, sach hay, sach nay
dien cua » dieu cua, dien cuc, tien cua
sach vay » sach va, sach hay, sach nay
va danh » va dinh, va dan, va hanh
dien cu » dien cuc, dien tu, dieu cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
soc va » hoc va, loc va, doc va

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 vay) or (sach vaya)) nang xa hoi. hieu va cham soc va danh ((dien cua) OR (dien cu)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach vay) OR (sach vaya)) nang xa hoi. hieu va cham soc va danh ((dien cua) OR (dien cu)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach vay) or (sach vaya)) nang xa hoi. hieu va cham soc va danh ((dien cua) OR (dien cu)) te".
• Adding a wildcard symbol may retrieve word variants: te ((sach vay) or (sach vaya)) nang xa hoi. hieu va cham soc va danh ((dien cua) OR (dien cu)) te*.