Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
ve triet » va trien, su triet
dan dau » danh dau, doan dau, van dau
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ma hoa. hieu va cham thuc va dan dau ((((cua tre) OR (cuu tre))) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoa. hieu va cham thuc va dan dau ((((cua tre) OR (cuu tre))) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoa. hieu va cham thuc va dan dau ((((cua tre) OR (cuu tre))) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoa. hieu va cham thuc va dan dau ((((cua tre) OR (cuu tre))) or (ve triet))*.