Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien hach » thien thanh, hien hanh
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, tuc va
doi cua » dai cua, hoi cua
duoc va » nuoc va, duc va, duoc ma
di cua » dai cua, de cua, do cua
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang xa hoi. hieu thien hach ((tuoc va) or (duoc va)) danh ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang xa hoi. hieu thien hach ((tuoc va) OR (duoc va)) danh ((di cua) OR (doi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang xa hoi. hieu thien hach ((tuoc va) or (duoc va)) danh ((di cua) or (doi cua)) tre*.