Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
hieu van » hieu va, thien van, lieu va
thanh ha » thanh hoa, thanh hai, nhanh ha
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
tu sach » thu sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ty nang o hoi. hieu van cam duc va ((thanh ha) OR (thanh phan)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang o hoi. hieu van cam duc va ((thanh ha) OR (thanh phan)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang o hoi. hieu van cam duc va ((thanh ha) OR (thanh phan)) cua te*.