Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
dat tren » dat trong, dua tren
lang xa » lang ha, dang xay, lang van
hanh va » hanh vi
y lang » o lang, _ lang, tay lang
va cap » va cac, va dap, va cao
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 hoi. lieu va cap cuu va ((hanh va) or (hang va)) ((cau tren) or (dat tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y lang xa hoi. lieu va cap cuu va ((hanh va) OR (hang va)) ((cau tren) OR (dat tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach y lang xa hoi. lieu va cap cuu va ((hanh va) or (hang va)) ((cau tren) or (dat tren))*.