Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, tay lang
soc va » hoc va, loc va, doc va
vi cua » vai cua, di cua

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

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