Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, thi nang
hanh hai » thanh hai, nhanh hai, hang hai
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hac tuc » thac toc, thai tuc
va hanh » van hanh, va thanh, va danh
va hac » van hac, va khac, va cac
tuc va » thuc va, truc va, tuc xa
hai va » hai van, thai va, hoi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tru nang) or (truc nano)) xa hoi. hieu va hac tuc va hanh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tru nang) OR (truc nano)) xa hoi. hieu va hac tuc va hanh hai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tru nang) or (truc nano)) xa hoi. hieu va hac tuc va hanh hai va triet*.