Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh ve, nhanh vi
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nam xua » nam cua, nam mua, nam qua
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
xua va » xuat va, vua va, sua 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 ky nang xa hoi. hieu van nam xua va ((thanh vi) or (thanh va)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu van nam xua va ((thanh vi) OR (thanh va)) ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van nam xua va ((thanh vi) or (thanh va)) ((cua tre) OR (cuu tre))*".