Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
sach lo » sach dao, sach doi, sach hoi
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luy tre » luyen tre
sach o » sac o, sach y, mach o
xuc va » tuc va, luc va, xac va
va luy » va duy, va ly, va luyen

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 o) or (sach lo)) lang xa hoi. hieu va cham ((xuc va) or (duc va)) thanh va luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach o) OR (sach lo)) lang xa hoi. hieu va cham ((xuc va) OR (duc va)) thanh va luy tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach o) or (sach lo)) lang xa hoi. hieu va cham ((xuc va) or (duc va)) thanh va luy tre*.