Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
cac co » cac cong
va cua » va chua, via cua, ca cua
anh va » hanh va
cac lo » cac lop, cac bo, cac ho
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cac lo) or (cac co)) tuan anh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cac lo) OR (cac co)) tuan anh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cac lo) or (cac co)) tuan anh va cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cac lo) or (cac co)) tuan anh va cua te*.