Perhaps you should try some spelling variations:
thanh kho » thanh pho, thanh ho, thanh thao
ky trang » ke trang, ky tang, ky nang
ky trong » ly trong, ke trong, cay trong
hieu van » hieu va, thien van, lieu va
lam duc » lam duoc, nam duoc, lam dung
kho cua » khoe cua, khi cua, cho cua
su sai » su tai, su hai, su dai
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ((ky trang) or (ky trong)) xa hoi. hieu van ((lam duc) OR (pham duc)) gia thanh kho cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ((ky trang) OR (ky trong)) xa hoi. hieu van ((lam duc) OR (pham duc)) gia thanh kho cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ((ky trang) or (ky trong)) xa hoi. hieu van ((lam duc) OR (pham duc)) gia thanh kho cua te".
• Adding a wildcard symbol may retrieve word variants: su sai ((ky trang) or (ky trong)) xa hoi. hieu van ((lam duc) OR (pham duc)) gia thanh kho cua te*.