Perhaps you should try some spelling variations:
manh thanh » danh thanh, minh thanh, manh thang
thanh lai » thanh hai, thanh lap, thanh loi
thien van » thi van
duc manh » suc manh, duc anh, duc minh
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
nam duc » nam duoc, pham duc, nam thuc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet

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 ((lang xa) OR (lang van)) hoi. ((hieu va) or (thien van)) nam duc manh thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (lang van)) hoi. ((hieu va) OR (thien van)) nam duc manh thanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((lang xa) OR (lang van)) hoi. ((hieu va) or (thien van)) nam duc manh thanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) OR (lang van)) hoi. ((hieu va) or (thien van)) nam duc manh thanh lai cua tre*.