Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
dan thi » dang thi, tran thi, dinh thi
dao thi » do thi, dang thi, doan thi
lam xuc » cam xuc, lam duoc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
va lam » van lam, va lap
xuc ca » xuc cam, xuc cua
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 (thuoc sach)) ty lang xa hoi. hieu va lam xuc ca ((dao thi) or (dan thi)) du tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ty lang xa hoi. hieu va lam xuc ca ((dao thi) OR (dan thi)) du tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ty lang xa hoi. hieu va lam xuc ca ((dao thi) or (dan thi)) du tre*".