Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang van » dang van, tang van, lang van
can thuc » dan thuc, van thuc, cay thuc
tu sach » thu sach, su sach, tu cach
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va lanh » va lang, va danh, va hanh
dao cua » dai cua, day cua, dan cua
va can » va chan, va cac, va cao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (((te sach) or (toc sach)))) ky nang van hoa. hieu va can thuc va lanh dao cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((te sach) OR (toc sach)))) ky nang van hoa. hieu va can thuc va lanh dao cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((te sach) or (toc sach)))) ky nang van hoa. hieu va can thuc va lanh dao cua te*.