Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va triet » va thiet, va trien, ve triet
thu sach » tu sach, thuat sach, thuoc sach
xa thanh » va thanh, ha thanh, ta thanh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
te sach » toc sach
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
dai va » mai va

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) or (hieu va)) cam tuc xa thanh dai 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) OR (hieu va)) cam tuc xa thanh dai va triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky lang xa hoi. ((hieu ve) or (hieu va)) cam tuc xa thanh dai va triet*.