Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
thu sac » thu sach, thu san, thu xac
ve phap » va phap, de phap, ve phan
hieu ve » hieu va, hieu van
hoi hoi » hoi hoc, hoc hoi, hoi doi
noi hoi » noi doi, doi hoi, noi hai
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 (hoi hoi)). hieu ve phap thuc day hanh ((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 (hoi hoi)). hieu ve phap thuc day hanh ((di cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ((noi hoi) or (hoi hoi)). hieu ve phap thuc day hanh ((di cua) or (dai cua)) te*.