Perhaps you should try some spelling variations:
sach tham » sach nha
manh hanh » xanh hanh, danh thanh, minh thanh
duc manh » suc manh, duc anh, duc minh
cham duc » pham duc, cham soc, pham duy
hieu va » lieu va, hieu qua
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
lam su » lai su, lam so
lam vu » sam vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sach tham)) nang xa hoi. hieu va cham duc manh hanh ((lam su) OR (lam vu)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach tham)) nang xa hoi. hieu va cham duc manh hanh ((lam su) OR (lam vu)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sach tham)) nang xa hoi. hieu va cham duc manh hanh ((lam su) OR (lam vu)) triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach tham)) nang xa hoi. hieu va cham duc manh hanh ((lam su) OR (lam vu)) triet*.