Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
nuoc gac » nuoc giai, nuoc giao, nuoc sach
ve triet » va trien, su triet
qua cac » cua cac
nang ma » tang ma, sang ma, nang cao
gac ky » cac ky, sac ky, bac ky
do van » dao van, vo van, so van
ma hoi » mai hoi, xa hoi, ma hoa
bo va » bao va, do va, so va

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc gac ky nang ma hoi. hieu qua cac ((bo va) or (do van)) thanh tai ((cua triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc gac ky nang ma hoi. hieu qua cac ((bo va) OR (do van)) thanh tai ((cua triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: nuoc gac ky nang ma hoi. hieu qua cac ((bo va) or (do van)) thanh tai ((cua triet) or (ve triet))*.