Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
danh mat » danh bat, dang mat, danh muc
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
mat cua » ma cua, manh cua, mang cua
tuc va » thuc va, truc va, duc va
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: ((toc sach) or (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (tuc xa)) danh mat cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (tuc xa)) danh mat cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (tuc xa)) danh mat cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky nang xa hoi. hieu van cham ((tuc va) OR (tuc xa)) danh mat cua te*.