Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va triet » va thiet, va trien, ve triet
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » hang tai, han tai, hinh tai
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
te sach » toc sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac

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) or (thu sach)) ky lang xa hoi. hieu ve cac tuc van ((hanh tai) OR (thanh tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky lang xa hoi. hieu ve cac tuc van ((hanh tai) OR (thanh tai)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) ky lang xa hoi. hieu ve cac tuc van ((hanh tai) OR (thanh tai)) va triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky lang xa hoi. hieu ve cac tuc van ((hanh tai) OR (thanh tai)) va triet*.