Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hang tai » hang va, dung tai
va hang » van hang, va nang, va lang
cam tuc » cam tu, nam thuc, dam thuc
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
hieu va » lieu va, hieu qua
tai ve » tai va, tai he, 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) OR (nang ma)) hoi. hieu va ((cam tuc) or (cam xuc)) va hang tai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((sang ma) OR (nang ma)) hoi. hieu va ((cam tuc) OR (cam xuc)) va hang tai ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((sang ma) OR (nang ma)) hoi. hieu va ((cam tuc) or (cam xuc)) va hang tai ve triet*".