Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hanh va » hang va, hanh vi
sach ty » sach y, sach tu, xach tay
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
va cuu » va cau, va chu, va huu
ve cam » ve cham, ve cac, va cam
do va » do van, so va
o va » so va, co va, bo va

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 ty) or (sach thu)) nang xa hoi. hieu ve cam ((o va) OR (do va)) hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu ve cam ((o va) OR (do va)) hanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach thu)) nang xa hoi. hieu ve cam ((o va) OR (do va)) hanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. hieu ve cam ((o va) OR (do va)) hanh va cuu tre*.