Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
tu sach » su sach, te sach, tu cach
cao luc » bao luc, cao duc, cao suc
luc van » luoc van, luu van, duc van
tu tren » tu truyen, tu tieng, tu trong
y sang » _ sang, duy sang
ma hoi » mai hoi, xa hoi, me hoi
va cao » va cac, va co, va dao
vi tu » vi tut, voi tu, va tu

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: ((thu sach) OR (tu sach)) y sang ((ma hoi) OR (ma hoa)). lieu va cao luc van hanh vi tu tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) y sang ((ma hoi) or (ma hoa)). lieu va cao luc van hanh vi tu tren~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) y sang ((ma hoi) or (ma hoa)). lieu va cao luc van hanh vi tu tren*.