Perhaps you should try some spelling variations:
danh dai » danh dau, danh di, danh sai
va triet » va trien, ve triet, cua triet
tru nang » tra nang, tri nang, truc nano
te sach » toc sach
tu nang » tu nong, tu nano, tu lang
hieu va » lieu va, hieu qua
cao suc » cao su, cao duc
va danh » va dinh, va dan, va hanh
va cao » va cac, va co, va dao
suc va » duc va, tuc va, luc va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tu nang) or (tru nang)) xa hoi. hieu va cao suc va danh dai ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tru nang)) xa hoi. hieu va cao suc va danh dai ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tru nang)) xa hoi. hieu va cao suc va danh dai ((va triet) or (va thiet))*.