Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
giang van » hoang van, gian dan, giang day
dang van » hoang van, hang va
hanh hai » thanh hai, nhanh hai, hang hai
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cac dac » cac dan, cac dai, cac bac
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
dac va » duc va, day va, dat va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nganh y ((giang van) or (dang van)) hoi. hieu ve cac dac va hanh hai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh y ((giang van) OR (dang van)) hoi. hieu ve cac dac va hanh hai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: hoc nganh y ((giang van) or (dang van)) hoi. hieu ve cac dac va hanh hai ((cua tre) or (cuu tre))*.