Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
hieu van » hieu va, thien van, hieu ve
than cuu » than cua, than cui, thanh luu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 y nang xa hoi. ((hieu van) or (lieu va)) bac ((xuc va) OR (tuc va)) thanh than cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((hieu van) OR (lieu va)) bac ((xuc va) OR (tuc va)) thanh than cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. ((hieu van) or (lieu va)) bac ((xuc va) OR (tuc va)) thanh than cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu van) or (lieu va)) bac ((xuc va) OR (tuc va)) thanh than cuu tre*.