Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
ty nang » ty xang, ty hang, ly nang
va pham » van pham, va phat, va phap
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ((ty nang) OR (ky nang)) o hoi. lieu va pham thuc va danh ((hai cua) or (hoi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((ty nang) OR (ky nang)) o hoi. lieu va pham thuc va danh ((hai cua) OR (hoi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ((ty nang) OR (ky nang)) o hoi. lieu va pham thuc va danh ((hai cua) or (hoi cua)) te".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((ty nang) OR (ky nang)) o hoi. lieu va pham thuc va danh ((hai cua) or (hoi cua)) te*.