Perhaps you should try some spelling variations:
hanh duoc » hanh thuoc, nganh duoc, doanh duoc
vu khach » vu khanh, vu khac, vay khach
thi cong » tai cong, thien cong
ban hanh » ban hang
danh dat » danh bat, dinh dat, dan dat
su sach » so sach, vu sach
cong xa » cong xay, cong xua, cong ha
thi ban » thi lan, tai ban, tri ban
duoc va » nuoc va, duc va, duoc ma
va danh » va dinh, va dan, va hanh
cau tre » cau tren, cau treo, cau tra

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) or (vu khach)) thi cong xa hoi. thi ban hanh duoc va danh dat cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) thi cong xa hoi. thi ban hanh duoc va danh dat cau tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) thi cong xa hoi. thi ban hanh duoc va danh dat cau tre*.