Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hang de » hoang de, hanh de, hang di
so sach » so sanh, bo sach, co sach
nang xa » lang xa, nang ma, mang xa
va hang » van hang, va nang, va lang
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, va cam
de va » de van, te va, ke va
thiet » thieu

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 (so sach)) ky ((nang xa) or (nang x)) hoi. hieu ve cam tuc va hang de va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cam tuc va hang de va thiet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky ((nang xa) or (nang x)) hoi. hieu ve cam tuc va hang de va thiet*.