Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua viet » ca viet, hoa viet, cua vat
tham xuc » tham nuoc, pham duc, cam xuc
tang ma » tang van
hieu va » lieu va, hieu qua
nam dan » nam dinh
dan dau » danh dau, doan dau, van dau
dau cua » dai cua, day cua, cau cua
te sach » toc sach

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 ((mang may) or (tang ma)) hoa. hieu va ((tham xuc) OR (tham thuc)) nam dan dau cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((mang may) OR (tang ma)) hoa. hieu va ((tham xuc) OR (tham thuc)) nam dan dau cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((mang may) or (tang ma)) hoa. hieu va ((tham xuc) OR (tham thuc)) nam dan dau cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach y ((mang may) or (tang ma)) hoa. hieu va ((tham xuc) OR (tham thuc)) nam dan dau cua viet*.