Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
lang van » dang van, tang van, hoang van
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van hai » van ha, van chat, van phan
luc va » duc va, tuc va, loc va
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang xa) or (lang van)) hoi. hieu ((van hai) or (van hanh)) luc va thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (lang van)) hoi. hieu ((van hai) OR (van hanh)) luc va thanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (lang van)) hoi. hieu ((van hai) or (van hanh)) luc va thanh vai su triet*.