Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
pham cuc » pham chuc, pham duc, pham cua
pham xuc » pham duc, pham xuan, pham chuc
va hanh » van hanh, va thanh, va danh
dai hoi » dai hoc, dai hai, dai moi
hieu su » hieu sau, tieu su, hieu so
vi cua » vai cua, di cua
tu sai » tu bai, tu san, tu cai
te bai » te bao, te tai, te ban
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) or (te bai)) ky nang dai hoi. hieu su ((pham xuc) OR (pham cuc)) va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (te bai)) ky nang dai hoi. hieu su ((pham xuc) OR (pham cuc)) va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) or (te bai)) ky nang dai hoi. hieu su ((pham xuc) OR (pham cuc)) va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (te bai)) ky nang dai hoi. hieu su ((pham xuc) OR (pham cuc)) va hanh vi cua te*.