Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
vien cua » viec cua, dien cua, tien cua
sach ky » sac ky, sach y, sach ty
hoa hoi » khoa hoi, hoa hoc, hoc hoi
hoa doi » hoa dai, hoc doi, xoa doi
van cau » van dau, van hau, van chat
cau tuc » cau truc, cau tu, cau luc
va nhan » van nhan, ca nhan, va phan
ho hoi » hoc hoi, hoi hoi, co hoi
tuc va » thuc va, truc va, tuc xa

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 ky nang ((ho hoi) or (((hoa hoi) OR (hoa doi)))). hieu van cau tuc va nhan vien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ho hoi) OR (((hoa hoi) OR (hoa doi)))). hieu van cau tuc va nhan vien cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((ho hoi) or (((hoa hoi) OR (hoa doi)))). hieu van cau tuc va nhan vien cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ho hoi) or (((hoa hoi) OR (hoa doi)))). hieu van cau tuc va nhan vien cua triet*.