Perhaps you should try some spelling variations:
ve triet » va trien, su triet
thanh la » thanh lap, thanh lam, thanh lan
va thanh » gia thanh, ban thanh, va tinh
thi hanh » thi thanh
nam thuc » nam thuoc, am thuc, nam thu
hieu le » hieu ve, hieu ly, tieu le
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, tu cach
hieu he » hieu ve, hiem he, hieu hien
hanh xa » hanh va, hanh ma, hanh xu
te sach » toc sach
la ve » ly ve, ca ve, va ve

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) or (te sach)) thi hanh xa hoi. ((hieu he) OR (hieu le)) nam thuc va thanh la ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thi hanh xa hoi. ((hieu he) OR (hieu le)) nam thuc va thanh la ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) thi hanh xa hoi. ((hieu he) OR (hieu le)) nam thuc va thanh la ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) thi hanh xa hoi. ((hieu he) OR (hieu le)) nam thuc va thanh la ve triet*.