Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dinh cau » dinh chau, dinh cuu, dinh cu
cau theo » cau thi, cau tao
nam hoc » nam moc, nam hoi, am hoc
va dang » van dang, va lang, da dang
va nang » van nang, da nang, cam nang
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 sac ky nang x hoi. hieu van nam hoc ((va dang) OR (va nang)) dinh cau theo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. hieu van nam hoc ((va dang) OR (va nang)) dinh cau theo".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. hieu van nam hoc ((va dang) OR (va nang)) dinh cau theo*.