Perhaps you should try some spelling variations:
sinh hoat » sinh hoc, sinh vat
pho thong » he thong
trac bach » truc bach, tran mach
sach bai » sach dao, cac bai, sach xa
hoat pho » hoat ho, hoc pho, hoa phi
dao trac » dao trang, dao tao, tap trac
tu sach » thu sach, su sach, te sach
bai hoc » dai hoc
tu lanh » tu hanh, tu lenh, tu manh
bach ha » bac ha, bich ha, sach ha
ha phap » han phap, va phap, ha pha

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 bai hoc sinh hoat pho thong ) or ( tu lanh dao trac bach ha phap tieng ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach bai hoc sinh hoat pho thong ) OR ( tu lanh dao trac bach ha phap tieng )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach bai hoc sinh hoat pho thong ) or ( tu lanh dao trac bach ha phap tieng ))*.