Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
luc ban » duc ban, luc bat, luc van
cuc ban » cua ban, cac ban, cuu ban
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach y) or (sac ky)) nang ma hoi. hieu va cam ((luc ban) or (cuc ban)) thanh ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach y) OR (sac ky)) nang ma hoi. hieu va cam ((luc ban) OR (cuc ban)) thanh ve su triet.
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach y) or (sac ky)) nang ma hoi. hieu va cam ((luc ban) or (cuc ban)) thanh ve su triet*.