Perhaps you should try some spelling variations:
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
va anh » van anh, va danh, va hanh
anh vu » hanh vu, anh tu, anh va
vu cua » hu cua, tu cua
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: ((tu sach) or (su sach)) ky nang ((ma hoi) or (xa hoi)). hieu ve cac luc va anh vu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((ma hoi) OR (xa hoi)). hieu ve cac luc va anh vu cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((ma hoi) or (xa hoi)). hieu ve cac luc va anh vu cua te*.