Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
toc sach » hoc sach, doc sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
te cac » tu cac, ve cac, te cao
va am » va lam, va cam

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) or (te cac)) ky nang x ho. hieu va am thuc va thanh dai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (te cac)) ky nang x ho. hieu va am thuc va thanh dai ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (te cac)) ky nang x ho. hieu va am thuc va thanh dai ((cua triet) OR (cua viet))*".