Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
thuc va » thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, va cam
dai va » mai va
di va » di vao, doi va, di vat

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 ty nang mai hoi. hieu ve cam ((thuc vat) or (thuc va)) hang ((di va) OR (dai va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang mai hoi. hieu ve cam ((thuc vat) OR (thuc va)) hang ((di va) OR (dai va)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang mai hoi. hieu ve cam ((thuc vat) or (thuc va)) hang ((di va) OR (dai va)) triet*".