Perhaps you should try some spelling variations:
thanh han » thanh phan, thanh nhan, thanh hang
hieu van » thien van, lieu va, hieu ve
thanh ha » thanh hoa, thanh hai, nhanh ha
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc gia » quoc gia
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x hoi. ((hieu van) OR (hieu va)) cam duc gia ((thanh ha) or (thanh han)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. ((hieu van) OR (hieu va)) cam duc gia ((thanh ha) OR (thanh han)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. ((hieu van) OR (hieu va)) cam duc gia ((thanh ha) or (thanh han)) cau tren".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. ((hieu van) OR (hieu va)) cam duc gia ((thanh ha) or (thanh han)) cau tren*.