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