Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
chien dich » phien dich, mien dich, trien dich
dich duc » dinh duc, dich nuoc, dich vu
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vi huu » vu huu, va huu, vien huu
vi luu » vi lua

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 ty ((nang xa) OR (nang ma)) hoi. chieu chien dich duc va hanh ((vi huu) or (vi luu)) tri~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. chieu chien dich duc va hanh ((vi huu) OR (vi luu)) tri.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (nang ma)) hoi. chieu chien dich duc va hanh ((vi huu) or (vi luu)) tri".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (nang ma)) hoi. chieu chien dich duc va hanh ((vi huu) or (vi luu)) tri*.