Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lang van » dang van, tang van, hoang van
cau tren » cu tren, dau tren, ca tren
cham cuu » cap cuu, chat cua
dat tren » dat trong, dua tren
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
lang xa » lang ha, dang xay
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 ((lang xa) OR (lang van)) hoi. lieu va cham cuu va hanh va ((cau tren) or (dat tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (lang van)) hoi. lieu va cham cuu va hanh va ((cau tren) OR (dat tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((lang xa) OR (lang van)) hoi. lieu va cham cuu va hanh va ((cau tren) or (dat tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) OR (lang van)) hoi. lieu va cham cuu va hanh va ((cau tren) or (dat tren))*.