Perhaps you should try some spelling variations:
thai tuc » thai thuc, thai thuy, thai hoc
hieu van » hieu va, thien van, lieu va
van thai » van thoai, van tai, van hai
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
su sach » so sach
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
vi cua » vai cua, di cua
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 sach) or (vu sach)) ky nang xa hoi. hieu van thai tuc ((va dinh) OR (va tinh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu van thai tuc ((va dinh) OR (va tinh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang xa hoi. hieu van thai tuc ((va dinh) OR (va tinh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang xa hoi. hieu van thai tuc ((va dinh) OR (va tinh)) vi cua te*.