Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va triet » va thiet, va trien, ve triet
hanh tai » hang tai, han tai, hinh tai
nam tuc » nam thuc, nam truc, nam tu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tao hoi » tao khoi, tay hoi, thao hoc
ky sang » ky nang, ky dang, ky tang
lieu ha » lieu nha, lieu va, liem ha

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 ((tao hoi) OR (tao boi)). lieu ha nam tuc xa ((hanh tai) or (thanh tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ((tao hoi) OR (tao boi)). lieu ha nam tuc xa ((hanh tai) OR (thanh tai)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang ((tao hoi) OR (tao boi)). lieu ha nam tuc xa ((hanh tai) or (thanh tai)) va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ((tao hoi) OR (tao boi)). lieu ha nam tuc xa ((hanh tai) or (thanh tai)) va triet*.