Perhaps you should try some spelling variations:
dum tren » dua tren, duc tren, dung tren
thu sach » thuat sach, thuoc sach, thu hoach
chat xuc » chat huu, cam xuc, chao xu
lang van » dang van, tang van, hoang van
hieu va » lieu va, hieu qua
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
tu sach » su sach, te sach, tu cach
hieu ve » hieu van
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
vi dum » vi du

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) or (thu sach)) ky lang van hoi. ((hieu ve) or (hieu va)) chat xuc va danh vi dum tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky lang van hoi. ((hieu ve) OR (hieu va)) chat xuc va danh vi dum tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky lang van hoi. ((hieu ve) or (hieu va)) chat xuc va danh vi dum tren*.