Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
tra nang » kha nang, da nang, va nang
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
cam cua » ca cua, nam cua, cau cua
danh du » danh dau, danh tu, dinh du
hanh de » hanh ve, hanh kem

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 ((thi nang) or (tra nang)) xa hoi. hieu van cam cua ban ((danh du) or (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((thi nang) OR (tra nang)) xa hoi. hieu van cam cua ban ((danh du) OR (hanh de)) cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((thi nang) or (tra nang)) xa hoi. hieu van cam cua ban ((danh du) or (hanh de)) cua triet*.