Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam ngoc » pham ngoc, lam nguoi, lang ngoc
su sach » so sach
vu sach » vu bach, vu khach
ky lang » ky dang, ky tang, tay lang
van lam » van nam
ngoc va » nuoc va, ngoc ha, goc va
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua te » cua tu

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 nang)) xa hoi. hieu van lam ngoc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van lam ngoc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van lam ngoc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van lam ngoc va hanh vi cua te*.