Perhaps you should try some spelling variations:
phap lang » phap nang, phap tang, phap sang
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
dinh thi » dinh tri
ca dinh » cac dinh, va dinh, ba dinh
lam xuc » lam duoc
lang xa » lang ha, dang xay, lang van
tu sach » su sach, te sach, tu cach
thi du » thi dua, thi dau, thi diu
du tre » duc tre, du tru, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) phap lang xa hoi. hieu van ((lam xuc) or (cam xuc)) ca dinh thi du tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) phap lang xa hoi. hieu van ((lam xuc) OR (cam xuc)) ca dinh thi du tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) phap lang xa hoi. hieu van ((lam xuc) or (cam xuc)) ca dinh thi du tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) phap lang xa hoi. hieu van ((lam xuc) or (cam xuc)) ca dinh thi du tre*.