Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
phat thi » pham thi, phan thi, phap thi
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (hoc cao)) ky nang xa hoi. hieu van cam xuc va phat thi ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cao)) ky nang xa hoi. hieu van cam xuc va phat thi ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc cao)) ky nang xa hoi. hieu van cam xuc va phat thi ((cua te) OR (cua tu))*".