Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach
vu sach » vu bach, vu khach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
lam loc » lam duoc, lam ngoc
va hanh » van hanh, va thanh, va danh
loc va » hoc va, luc va
cua su » qua su

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) or (vu sach)) ky lang xa hoi. ((hieu van) OR (lieu va)) lam loc va hanh dai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky lang xa hoi. ((hieu van) OR (lieu va)) lam loc va hanh dai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky lang xa hoi. ((hieu van) OR (lieu va)) lam loc va hanh dai cua su".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky lang xa hoi. ((hieu van) OR (lieu va)) lam loc va hanh dai cua su*.