Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
dang van » hoang van, hang va
hanh hai » thanh hai, nhanh hai, hang hai
nganh ky » nganh y, nganh xay, hanh ky
cau treo » cau theo, cau tren, cau triet
gian dan » gian lang
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
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 ky ((gian dan) or (dang van)) hoi. hieu ve cac dac va hanh hai ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh ky ((gian dan) OR (dang van)) hoi. hieu ve cac dac va hanh hai ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: hoc nganh ky ((gian dan) or (dang van)) hoi. hieu ve cac dac va hanh hai ((cua tre) or (cau treo))*.