Perhaps you should try some spelling variations:
nhan hanh » nhan nhanh, nhan thanh, nhat hanh
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
su sach » so sach, vu sach
lam duc » pham duc, nam duoc, lam dung
ty hang » ly hang, thi hang, thu hang
vi cua » vai cua, di cua
cua te » cua tu

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 ((ty hang) or (ty xang)) xa hoi. hieu van ((lam duc) OR (lam duoc)) nhan hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ty xang)) xa hoi. hieu van ((lam duc) OR (lam duoc)) nhan hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (ty xang)) xa hoi. hieu van ((lam duc) OR (lam duoc)) nhan hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ty xang)) xa hoi. hieu van ((lam duc) OR (lam duoc)) nhan hanh vi cua te*.