Perhaps you should try some spelling variations:
sinh hoat » sinh hoc, sinh vat
pho thong » he thong
manh dao » lanh dao, minh dao, hanh dao
hoat pho » hoat ho, hoc pho, hoa phi
tu sach » thu sach, su sach, te sach
bich ha » bich nga
bach ha » bac ha, sach ha, bach khoa
dao tuc » dao duc
tu manh » tu minh, tu hanh, vu manh
sach xa » sach dao, sach nha, sach bai
xa hoc » xa hoi, va hoc, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach xa hoc sinh hoat pho thong ) or ( tu manh dao tuc ((bach ha) or (bich ha)) phap tieng ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach xa hoc sinh hoat pho thong ) OR ( tu manh dao tuc ((bach ha) OR (bich ha)) phap tieng )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach xa hoc sinh hoat pho thong ) or ( tu manh dao tuc ((bach ha) or (bich ha)) phap tieng ))*.