Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
hanh dai » hanh tai, hanh dao, vanh dai
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
nang doc » nang luc
sach kem » hanh kem
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach kem) or (sach y)) ((nang noi) or (nang doc)) hoi. hieu ve pham thuc day hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach kem) OR (sach y)) ((nang noi) OR (nang doc)) hoi. hieu ve pham thuc day hanh dai cua tu.
• Adding a wildcard symbol may retrieve word variants: thu ((sach kem) or (sach y)) ((nang noi) or (nang doc)) hoi. hieu ve pham thuc day hanh dai cua tu*.