Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ly hang » ly quang
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
danh va » doanh va, hanh va, anh va
cuu tre » cua tre, cau tren, cau treo
luc va » tuc va, loc va
va cuu » va cau, va chu, va huu

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 ((ky nang) or (ly hang)) xa hoi. hieu vu cham ((luc va) or (duc va)) danh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky nang) OR (ly hang)) xa hoi. hieu vu cham ((luc va) OR (duc va)) danh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky nang) or (ly hang)) xa hoi. hieu vu cham ((luc va) or (duc va)) danh va cuu tre*.