Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
thu xac » thau xay
nang ma » tang ma, sang ma, nang cao
duoc va » nuoc va, duoc ma, duong va
hanh di » hanh vi, hanh de, hang di
xac ky » cac ky, sac ky, bac ky
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu xac ky nang ma hoi. ((hieu qua) or (hieu quan)) tao ((duoc va) or (duc va)) hanh di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu xac ky nang ma hoi. ((hieu qua) OR (hieu quan)) tao ((duoc va) OR (duc va)) hanh di cua su.
• Adding a wildcard symbol may retrieve word variants: thu xac ky nang ma hoi. ((hieu qua) or (hieu quan)) tao ((duoc va) or (duc va)) hanh di cua su*.