Perhaps you should try some spelling variations:
nang luong » nang song
thien van » thi van
luong cua » huong cua, long cua, luong quan
thu sach » tu sach, thuat sach, thuoc sach
luc cam » luc lam, luc tam, xuc cam
cau luc » cau truc, cau phuc
cua duc » cua tuc, cua nuoc, cua quoc
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa

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 x)) hoi. ((hieu ve) or (thien van)) cau luc cam nang luong cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (thien van)) cau luc cam nang luong cua duc.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (nang x)) hoi. ((hieu ve) or (thien van)) cau luc cam nang luong cua duc*.