Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham loc » cham soc, chon loc, cham o
va hanh » van hanh, va thanh, va danh
vu nang » vuc nang, va nang, vu dang
hieu ve » hieu van
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
loc va » hoc va, luc va
cua cu » cua chu, cua cau, cua su
y nang » ky nang, ly nang, v nang

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 ((y nang) or (vu nang)) xa hoi. ((hieu ve) or (hieu va)) cham loc va hanh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (vu nang)) xa hoi. ((hieu ve) OR (hieu va)) cham loc va hanh vi cua cu.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (vu nang)) xa hoi. ((hieu ve) or (hieu va)) cham loc va hanh vi cua cu*.