Perhaps you should try some spelling variations:
thien van » thi van
thu sach » thuat sach, thuoc sach, thu hoach
dinh thi » dinh tri
thi duc » thi cuc, thi dua, thi du
van lam » van nam
lang xa » lang ha, dang xay, lang van
tu lang » cu lang, tu lanh, xu lang
tu sach » su sach, te sach, tu cach
duc tre » duoc tren, duc tien
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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)) tu lang xa hoi. thien van lam ((xuc va) OR (luc va)) dinh thi duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) tu lang xa hoi. thien van lam ((xuc va) OR (luc va)) dinh thi duc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) tu lang xa hoi. thien van lam ((xuc va) OR (luc va)) dinh thi duc tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) tu lang xa hoi. thien van lam ((xuc va) OR (luc va)) dinh thi duc tre*.