Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
he triet » ve triet, chet triet, hieu triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
va hang » van hang, va nang, va lang
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » cam thu, nam tu, dam tu
tai he » tai hoe, tai ha, tai le

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky sang ma hoi. hieu va ((cam tu) or (cam xuc)) va hang tai he triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ma hoi. hieu va ((cam tu) OR (cam xuc)) va hang tai he triet*.