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