Perhaps you should try some spelling variations:
cua trung » cua truong, xuan trung, cua nhung
cua triet » su triet, va triet
ban thanh » ban hanh, ban hang
trung ban » trong ban, trung van, trung can
cua viet » ca viet, hoa viet, cua vat
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
qua cua » quan cua, quang cua, qua quan
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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 (do sanh)) y nang ma hoi. hieu qua cua trung ban thanh vi ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (do sanh)) y nang ma hoi. hieu qua cua trung ban thanh vi ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (do sanh)) y nang ma hoi. hieu qua cua trung ban thanh vi ((cua triet) or (cua viet))*.