Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, mang xa
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
cam luc » cam xuc, cau luc
luc va » duc va, tuc va, loc va
di qua » di cua, di quanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) cam luc va hang di qua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu van)) cam luc va hang di qua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) cam luc va hang di qua su".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) cam luc va hang di qua su*.