Perhaps you should try some spelling variations:
dao nang » cao nang, da nang, dai nang
sach dao » lanh dao
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
cu tren » tu tren, dua tren
van cau » van dau, van hau, van chat
thi van » thi lan, thi hanh, thi nang
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, duc va

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 dao nang xa hoi. thi van cau ((tuc va) OR (tuc xa)) hanh vi ((cua tre) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach dao nang xa hoi. thi van cau ((tuc va) OR (tuc xa)) hanh vi ((cua tre) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach dao nang xa hoi. thi van cau ((tuc va) OR (tuc xa)) hanh vi ((cua tre) or (cu tren))".
• Adding a wildcard symbol may retrieve word variants: su sach dao nang xa hoi. thi van cau ((tuc va) OR (tuc xa)) hanh vi ((cua tre) or (cu tren))*.