Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cuoc van » cuoi van, luoc van, quoc van
van sinh » van minh, va sinh, van dinh
ty nang » ty xang, ty hang, ty nong
ly nang » ly hang, ly vang, ly quang
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
ca cuoc » va cuoc, cho cuoc, dao cuoc
vat cua » mat cua, bat cua, dat cua
cua cay » cua cac
ve ca » ve cac, ve cai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((((ty nang) OR (ly nang))) or (ky nang)) cho hoc. hieu ve ca cuoc van sinh vat cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((((ty nang) OR (ly nang))) OR (ky nang)) cho hoc. hieu ve ca cuoc van sinh vat cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((((ty nang) OR (ly nang))) or (ky nang)) cho hoc. hieu ve ca cuoc van sinh vat cua cay*".