Perhaps you should try some spelling variations:
nhanh thi » nhanh thai, nhanh thuc, nhan tai
hieu van » hieu va, thien van, lieu va
thuc van » thuc vat, thuc dan, thuc va
van cam » van nam, van lam, van cau
tuc van » truc van, tuc va, duc van
co viet » so viet, o viet, hoc viet
su sac » su sach, su xac
su cac » tu cac, su cao, su can
thi co » thi mo, thi cu, thi bo
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 cac)) ky nang x hoi. hieu van cam ((tuc van) or (thuc van)) nhanh thi co viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cac)) ky nang x hoi. hieu van cam ((tuc van) OR (thuc van)) nhanh thi co viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su cac)) ky nang x hoi. hieu van cam ((tuc van) or (thuc van)) nhanh thi co viet*".