Perhaps you should try some spelling variations:
sach tai » sach bai, sach tham, sach dao
tai nang » thi nang, tai lang, dai nang
thuc dan » hoc dan, thuc vat
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
ve nam » he nam, va nam, le nam
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, x ho

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 tai nang x hoi. hieu ve nam ((thuc dan) or (thuc hanh)) hanh ve cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tai nang x hoi. hieu ve nam ((thuc dan) OR (thuc hanh)) hanh ve cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach tai nang x hoi. hieu ve nam ((thuc dan) or (thuc hanh)) hanh ve cua viet*.