Perhaps you should try some spelling variations:
loai tren » la tren, thai tren
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
kham vuc » kham cuoc, khu vuc, pham vu
thu sach » tu sach, thuat sach, thuoc sach
kly danh » ky danh, ly doanh, le danh
hieu vu » hieu va, hieu ve, hieu su
vuc van » duc van, luc van, thuc van
ly danh » ly doanh, ly anh, le danh
cu tren » tu tren, dua tren
vu kham » vu khanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ly danh) or (kly danh)) xa hoi. hieu vu kham vuc van thanh vi ((cu tren) or (loai tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly danh) OR (kly danh)) xa hoi. hieu vu kham vuc van thanh vi ((cu tren) OR (loai tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ((ly danh) or (kly danh)) xa hoi. hieu vu kham vuc van thanh vi ((cu tren) or (loai tren))*.