Perhaps you should try some spelling variations:
nang thanh » dang thanh, tang thanh, nhanh thanh
thanh luc » thanh luu, than luc, nhan luc
thi nang » ki nang, thi hanh
hanh dat » thanh dat, anh dat, hanh cat
vu khach » vu khanh, vu khac, vay khach
thi hong » thi phuong, thi hanh
thi cong » tai cong, thien cong
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, ban hanh
cau tre » cau tren, cau treo, cau tra
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (vu khach)) ((thi hong) OR (thi cong)) xa hoi. thi nang thanh luc va hanh dat cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu khach)) ((thi hong) OR (thi cong)) xa hoi. thi nang thanh luc va hanh dat cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu khach)) ((thi hong) OR (thi cong)) xa hoi. thi nang thanh luc va hanh dat cau tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu khach)) ((thi hong) OR (thi cong)) xa hoi. thi nang thanh luc va hanh dat cau tre*.