Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
nang xa » lang xa, nang ma, mang xa
cao luc » bao luc, cao duc, cao suc
luc van » luoc van, luu van, duc van
cu tren » tu tren, dua tren
va cao » va cac, va co, va dao
vi cu » vi su, vi xu, vi du

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. lieu va cao luc van hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (nang x)) hoi. lieu va cao luc van hanh vi cu tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (nang x)) hoi. lieu va cao luc van hanh vi cu tren*.