Perhaps you should try some spelling variations:
thong duong » tuong duong, thong dung, thong huong
hoc chinh » hoan chinh, hoc sinh, hoc kinh
hoa chinh » hoan chinh, hoa hinh, hoa thinh
tinh sinh » tinh ninh, tinh binh, tinh hinh
vat thong » va thong, vat trong, mat thong
duong dan » duong dang, huong dan, duong van
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chinh) or (hoa chinh)) sach - tinh sinh vat thong duong dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoa chinh)) sach - tinh sinh vat thong duong dan phan cac.
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (hoa chinh)) sach - tinh sinh vat thong duong dan phan cac*.