Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ve chat » va chat, van chat
han tai » hang tai, nhan tai, van tai
van han » van hanh, van phan, van nhan
duc van » duc va, duc tan, duc manh
ve cham » va cham, vu cham, ve chim
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
tai va » thai va, mai va, tri 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 ((y nang) or (ly nang)) xa hoi. hieu ((ve cham) or (ve chat)) duc van han tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) xa hoi. hieu ((ve cham) OR (ve chat)) duc van han tai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly nang)) xa hoi. hieu ((ve cham) or (ve chat)) duc van han tai va thiet*.