Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, hinh tai, nhanh thai
te sach » toc sach
han tai » hang tai, nhan tai, van tai
nam tuc » nam thuc, nam truc, nam tu
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cuc tre » duc tre, cua tre, cuu tre
va nam » van nam, ha nam, va nay
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky sang ma hoi. hieu va nam tuc xa ((((hanh tai) OR (thanh tai))) or (han tai)) cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang ma hoi. hieu va nam tuc xa ((((hanh tai) OR (thanh tai))) OR (han tai)) cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky sang ma hoi. hieu va nam tuc xa ((((hanh tai) OR (thanh tai))) or (han tai)) cuc tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang ma hoi. hieu va nam tuc xa ((((hanh tai) OR (thanh tai))) or (han tai)) cuc tre*.