Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
cam suc » cam xuc, cao suc, cham soc
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty lang » tay lang, ty xang, tu lang
ve cam » ve cham, ve cac, va cam

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