Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vat tinh » sat tinh, vat sinh, hoat tinh
dau tien » van tien
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
tinh va » tich va, trinh van, trinh vat
ca tren » cau tren, cu tren, la tren
ha hoi » hoa hoi, ha noi, xa hoi

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 ha hoi. hieu van nam cua vat tinh va ((dau tien) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ha hoi. hieu van nam cua vat tinh va ((dau tien) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ha hoi. hieu van nam cua vat tinh va ((dau tien) or (ca tren))*.