Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang dai » nang dau, nang tai, lang dai
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu van
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
y nang » ky nang, ly nang, v nang
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: su sach y nang dai hai. ((hieu ve) OR (hieu va)) cam luc van hanh hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang dai hai. ((hieu ve) OR (hieu va)) cam luc van hanh hai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang dai hai. ((hieu ve) OR (hieu va)) cam luc van hanh hai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang dai hai. ((hieu ve) OR (hieu va)) cam luc van hanh hai ((cua tre) or (cua te))*.