Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
chat soc » cham soc, chat hoc, chat doc
van hanh » van thanh, ban hanh, van anh
dau tien » van tien
mang xa » lang xa, dang xay, mang cua
nang ma » tang ma, sang ma, nang cao
va chat » van chat, va phat, cao chat
soc van » hoc van, oc van, sac van
vi dau » vi dai, va dau, bi dau

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 y ((((mang xa) OR (mang may))) or (nang ma)) hoi. lieu va chat soc van hanh vi dau tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((((mang xa) OR (mang may))) OR (nang ma)) hoi. lieu va chat soc van hanh vi dau tien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((((mang xa) OR (mang may))) or (nang ma)) hoi. lieu va chat soc van hanh vi dau tien*".