Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cham tuc » nham thuc, pham thuc, cham soc
hanh dau » hang dau, danh dau, han dau
ve triet » va trien, su triet
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
y nang » ky nang, ly nang, v nang

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 tuc) or (tham thuc)) va hanh dau ((cua 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 tuc) OR (tham thuc)) va hanh dau ((cua tre) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoa. hieu va ((cham tuc) or (tham thuc)) va hanh dau ((cua tre) or (ve triet))*.