Perhaps you should try some spelling variations:
van thiet » va thiet, dan thiet, can thiet
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
han thai » han tai, ban thai, van thai
thai van » thi van, thanh van, thai vung
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky lang xa hoi. hieu van cham ((xuc va) OR (tuc va)) han thai van thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. hieu van cham ((xuc va) OR (tuc va)) han thai van thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. hieu van cham ((xuc va) OR (tuc va)) han thai van thiet*.