Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
day thanh » dao thanh, dat thanh, da thanh
hieu van » hieu va, thien van, lieu va
van phap » ban phap, va phap, van phan
thuc day » thuc dan, thuc vat
thu sac » thu sach, thu san, thu xac
hoc hoi » hoc khoi, hoc hoa, hoc noi
noi hoi » noi doi, doi hoi, hoi hoi
sac ky » cac ky, sai ky
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang ((noi hoi) or (hoc hoi)). hieu van phap thuc day thanh ((di cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ((noi hoi) OR (hoc hoi)). hieu van phap thuc day thanh ((di cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ((noi hoi) or (hoc hoi)). hieu van phap thuc day thanh ((di cua) or (dai cua)) te*.