Perhaps you should try some spelling variations:
thien van » thi van
va thanh » gia thanh, ban thanh, le thanh
hieu van » hieu va, lieu va, hieu ve
su sach » so sach, vu sach
hoa cuu » hoa huu, hoa cua, ho cuu
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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