Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
xuc va » duc va, tuc va, luc va
ma hoi » xa hoi, ma hoa, me hoi
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: tu sach ky nang ((ma hoi) OR (mai hoi)). hieu ve chat xuc va ((hanh va) or (hanh tai)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (mai hoi)). hieu ve chat xuc va ((hanh va) OR (hanh tai)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) OR (mai hoi)). hieu ve chat xuc va ((hanh va) or (hanh tai)) va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) OR (mai hoi)). hieu ve chat xuc va ((hanh va) or (hanh tai)) va thiet*.