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
hieu ve » hieu va, hieu van
ve chao » ve chat, ve cham, ve cho
chao tu » chao xu, cho tu, cao tu
hanh va » hang va
thiet » thieu

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. hieu ve chao tu va ((hanh va) OR (hanh vi)) va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ve chao tu va ((hanh va) OR (hanh vi)) va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ve chao tu va ((hanh va) OR (hanh vi)) va thiet*.