Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
han mac » nhan mac, ban mach, hanh mau
han mai » han tai, ban mai, tan mai
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho
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 ky nang x hoi. hieu ((ve cham) or (ve chat)) xuc va ((han mai) OR (han mac)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((ve cham) OR (ve chat)) xuc va ((han mai) OR (han mac)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((ve cham) or (ve chat)) xuc va ((han mai) OR (han mac)) va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((ve cham) or (ve chat)) xuc va ((han mai) OR (han mac)) va thiet*.