Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
vat thanh » dat thanh, gat thanh, tat thanh
hieu van » thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
va trien » va truyen, va thiet, va tuyen
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hai va » hai van, thai va, hoi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. ((((hieu ve) OR (hieu van))) or (hieu va)) nam thuc vat thanh hai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. ((((hieu ve) OR (hieu van))) OR (hieu va)) nam thuc vat thanh hai va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. ((((hieu ve) OR (hieu van))) or (hieu va)) nam thuc vat thanh hai va trien*".