Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
su sach » so sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
lam hoc » am hoc, lam hoa, tam hoc
van lam » van nam
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
vu sach » vu bach, vu khach
cua tu » cua tuc, cua su, cua cu

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) or (vu sach)) ((ky lang) or (ky dang)) xa hoi. hieu van lam hoc va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ((ky lang) OR (ky dang)) xa hoi. hieu van lam hoc va hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ((ky lang) or (ky dang)) xa hoi. hieu van lam hoc va hanh vai cua tu*.