Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
hoc sach » hoc sinh, hoc cac, hoc anh
thu nang » thi nang, thu hang, thu bang
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van hac » van hoc, van ha, van hai
lai cua » dai cua, hai cua, lai chau
hac suc » phan suc
cua tu » cua tuc, cua su, cua cu
ma hoi » mai hoi, ma hoa, me hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (hoc sach)) thu nang ((ma hoi) OR (xa hoi)). hieu van hac suc manh hanh lai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) thu nang ((ma hoi) OR (xa hoi)). hieu van hac suc manh hanh lai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (hoc sach)) thu nang ((ma hoi) OR (xa hoi)). hieu van hac suc manh hanh lai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) thu nang ((ma hoi) OR (xa hoi)). hieu van hac suc manh hanh lai cua tu*.