Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay, lang van
nam luc » nang luc, nhan luc, nam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((cuon sach) or (hoc sach)) _ lang xa hoi. hieu van nam luc va hanh va ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuon sach) OR (hoc sach)) _ lang xa hoi. hieu van nam luc va hanh va ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((cuon sach) or (hoc sach)) _ lang xa hoi. hieu van nam luc va hanh va ((cuu tre) or (cua te))*.