Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hanh va » hanh vi
cu tren » tu tren, dua tren
co luc » coc luc, co luy
luc va » duc va, tuc va, loc va
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. lieu va co luc va ((hanh va) OR (hang va)) cu tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va co luc va ((hanh va) OR (hang va)) cu tren".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va co luc va ((hanh va) OR (hang va)) cu tren*.