Perhaps you should try some spelling variations:
khong xuong » khong dung, hong vuong, thong duong
xuong dan » huong dan, xuong san, tuong dan
hoc thuc » hoc huu
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuc hanh - hanh ((tang cua) or (mang cua)) khong xuong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuc hanh - hanh ((tang cua) OR (mang cua)) khong xuong dan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thuc hanh - hanh ((tang cua) or (mang cua)) khong xuong dan ((toan cau) or (toan cao))*.