Perhaps you should try some spelling variations:
nhanh bac » nhanh ha, nhanh va
thuc van » thuc dan, thuc va, thuc hanh
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
ca viet » va viet, co viet, hoa viet
su sac » su sach, su cac
su xac » pu xac, su cac
bac ca » bac can, bac cao, bac cau
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: ((su sac) or (su xac)) ky nang x hoi. hieu ve tham ((thuc van) OR (thuc vat)) nhanh bac ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang x hoi. hieu ve tham ((thuc van) OR (thuc vat)) nhanh bac ca viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky nang x hoi. hieu ve tham ((thuc van) OR (thuc vat)) nhanh bac ca viet*".