Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dinh cuu » dinh chi
hoc sach » hoc sinh, hoc cac, hoc anh
tuan soc » quan so, xuan son, dan soc
van tuan » van quan, van ban, anh tuan
va hanh » van hanh, va thanh, va danh
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
soc va » hoc va, loc va, doc va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (hoc sach)) ky tang xa hoi. hieu van tuan soc va hanh ((vi cuu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky tang xa hoi. hieu van tuan soc va hanh ((vi cuu) OR (dinh cuu)) tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky tang xa hoi. hieu van tuan soc va hanh ((vi cuu) or (dinh cuu)) tre*.