Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cam luc » cam xuc, cau luc
thoi su » khoi su, thong su, thoi rua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
van cam » van nam, van lam, van cau
cao hoc » co hoc, cho hoc, chat hoc
ty nang » ky nang, ty hang, ly nang
su viet » so viet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (ty xang)) cao hoc. hieu van cam luc ((va hanh) or (va danh)) thoi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) cao hoc. hieu van cam luc ((va hanh) OR (va danh)) thoi su viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) cao hoc. hieu van cam luc ((va hanh) or (va danh)) thoi su viet*.