Perhaps you should try some spelling variations:
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
hieu va » lieu va
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
sach va » sach xa, sach ha, sach dao
sach v » sach y, sach 2, sach vay
luc va » duc va, tuc va, loc va
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach v) OR (sach va)) nang xa hoi. ((hieu va) or (hieu qua)) cam luc va hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach v) OR (sach va)) nang xa hoi. ((hieu va) OR (hieu qua)) cam luc va hanh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach v) OR (sach va)) nang xa hoi. ((hieu va) or (hieu qua)) cam luc va hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach v) OR (sach va)) nang xa hoi. ((hieu va) or (hieu qua)) cam luc va hanh di cuu tre*.