Perhaps you should try some spelling variations:
voi doanh » von doanh, tri doanh, hoa doanh
thu sach » tu sach, thuat sach, thuoc sach
va doanh » van doanh, vay doanh, va danh
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cam luc » cam xuc, cau luc
nang xa » nang x, lang xa, mang xa
ve cam » ve cham, ve cac, va cam

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 ((nang xa) or (nang ma)) hoi. hieu ve cam luc ((va doanh) or (voi doanh)) va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cam luc ((va doanh) OR (voi doanh)) va su triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (nang ma)) hoi. hieu ve cam luc ((va doanh) or (voi doanh)) va su triet*.