Perhaps you should try some spelling variations:
thien quan » trien quang, lien quan, thien van
hieu quan » hieu qua, lieu quan, lien quan
va triet » va thiet, va trien, ve triet
hanh hai » thanh hai, nhanh hai, hang hai
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
vu sach » vu bach, su sach, vu khach
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
hai va » hai van, thai va, hoi va

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

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