Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hieu hien » bieu hien, dieu hien, chieu chien
thanh doi » thanh loi, thanh moi, thanh do
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, tuc va
duoc va » nuoc va, duoc ma, duong va
doi cua » dai cua, hoi cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu hien hanh ((tuoc va) or (((duoc va) or (duc va)))) thanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu hien hanh ((tuoc va) OR (((duoc va) OR (duc va)))) thanh doi cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu hien hanh ((tuoc va) or (((duoc va) or (duc va)))) thanh doi cua te*.