Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
van toan » van tuan, van tan, van thanh
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
va cam » va cham, va cac, va cao
di su » doi su, ki su, de su
da su » dan su, dat su, va 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 sang mai hoi. hieu ((ve cham) or (va cam)) xuc van toan ((di su) OR (da su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang mai hoi. hieu ((ve cham) OR (va cam)) xuc van toan ((di su) OR (da su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang mai hoi. hieu ((ve cham) or (va cam)) xuc van toan ((di su) OR (da su)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang mai hoi. hieu ((ve cham) or (va cam)) xuc van toan ((di su) OR (da su)) triet*.