Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
danh dat » danh bat, dinh dat, dan dat
hanh luc » hanh phuc, hanh luat, thanh luu
ban hanh » ban hang
thi hong » thi cong, thi phuong, thi hanh
vu khach » vu khanh, vu khac, vay khach
hong xa » hoang xa, phong xa, hmong xa
thi ban » thi lan, tai ban, tri ban
va danh » va dinh, va dan, va hanh
cau tre » cau treo, cau tra, cuu tre
so sach » so sanh, bo sach, co sach
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 xa hoi. thi ban hanh luc va danh dat ((cau tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu khach)) thi hong xa hoi. thi ban hanh luc va danh dat ((cau tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu khach)) thi hong xa hoi. thi ban hanh luc va danh dat ((cau tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu khach)) thi hong xa hoi. thi ban hanh luc va danh dat ((cau tre) OR (cau tren))*.