Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
ve cham » va cham, ve chat, vu cham
va chat » van chat, va phat, cao chat
van mai » van hai, van ai, ban mai
luc va » duc va, tuc va, loc 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) or (ty hang)) xa hoi. hieu ((ve cham) or (va chat)) luc va van mai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ((ve cham) OR (va chat)) luc va van mai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty hang)) xa hoi. hieu ((ve cham) or (va chat)) luc va van mai va thiet*.