Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
sach lo » sach dao, sach doi, sach hoi
cua tre » cua te, cuu tre, cua triet
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang
tuc va » thuc va, tuc xa, 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 lo nang xa hoi. thien van cac ((tuc va) OR (truc va)) hanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo nang xa hoi. thien van cac ((tuc va) OR (truc va)) hanh vi ((cua tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach lo nang xa hoi. thien van cac ((tuc va) OR (truc va)) hanh vi ((cua tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: su sach lo nang xa hoi. thien van cac ((tuc va) OR (truc va)) hanh vi ((cua tre) or (cau tren))*.