Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham cuu » cap cuu, chat cua
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hanh va » hang va
va cham » va chat, va tham
cuu va » cuu van, cuu ve

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