Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
ve cham » va cham, vu cham, ve chim
ve chat » va chat, van chat
y nang » ky nang, v nang, may nang
va ban » van ban, va bai, va bao
ban ma » ban va
ma va » ma van, mua va, me 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 va ban ma 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 va ban ma 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 va ban ma va thiet*.