Perhaps you should try some spelling variations:
sinh tren » dinh tren, tinh tren, sinh trung
vai huyen » tai huyen, van chuyen, thai huyen
kien nuoc » bien nuoc, gieng nuoc, bien duoc
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach khoa » bach khoa, sach nha, anh khoa
khoa than » khoa luan, hoa thai, hoa tan
tren vai » trien van, trang vai, tien va
so sinh » so sanh, so tinh, cho sinh
cung ha » cung hay, cung nha, dung ha
cong ha » cong hoa, dong ha, cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sinh tren vai huyen đe ky thuat: kien nuoc sach khoa than ((cung ha) or (cong ha)) tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh tren vai huyen đe ky thuat: kien nuoc sach khoa than ((cung ha) OR (cong ha)) tinh.
• Adding a wildcard symbol may retrieve word variants: so sinh tren vai huyen đe ky thuat: kien nuoc sach khoa than ((cung ha) or (cong ha)) tinh*.