Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hang hoa » hang khoa, thanh hoa, hang va
su sach » so sach, vu sach
luc van » luoc van, luu van, duc van
thuc te » thuc tien
sach ky » sac ky, sach y, sach ty
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao

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 ky tang xa hoi. hieu ((ve cam) or (va cam)) luc van ((thanh hai) or (hang hoa)) thuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. hieu ((ve cam) OR (va cam)) luc van ((thanh hai) OR (hang hoa)) thuc te.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu ((ve cam) or (va cam)) luc van ((thanh hai) or (hang hoa)) thuc te*.