Perhaps you should try some spelling variations:
hieu cac » hieu luc, hieu va, hieu van
cac chat » cao chat, cac thuat, cac nha
chat luc » chat xuc, chat lua, nhan luc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
luc van » luoc van, luu van, duc van
van anh » van thanh, tuan anh, van minh
lam va » dam va, lam ha, am va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu cac chat luc van anh ((lam va) or (nam va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu cac chat luc van anh ((lam va) OR (nam va)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu cac chat luc van anh ((lam va) or (nam va)) triet*.