Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ky lang » ky dang, tay lang
ky tang » ky dang, kho tang, ky trong
van hau » van ha, van hai, van dau
hau tac » khau tai, cau thac, chau bac
tac cua » tac quan, thuc cua
cua dan » cua dang, cua ban, ca dan
cuu tre » cua tre, cau tren, cau treo
dan vi » doan vi, don vi, dan 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 ((ky lang) or (((ky tang) OR (ky nang)))) xa hoi. hieu van hau tac cua dan vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (((ky tang) OR (ky nang)))) xa hoi. hieu van hau tac cua dan vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (((ky tang) OR (ky nang)))) xa hoi. hieu van hau tac cua dan vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (((ky tang) OR (ky nang)))) xa hoi. hieu van hau tac cua dan vi cuu tre*.