Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
manh trung » manh tung, thanh trung, manh hung
hoc nganh » hoc nhanh
nhu hieu » nhu hien, nha hieu, nho hieu
hoc hanh » hoc nhanh, hoc thanh, hoc anh
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban
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: nhu hieu quang - manh trung ((hoc hanh) or (hoc nganh)) cong dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhu hieu quang - manh trung ((hoc hanh) OR (hoc nganh)) cong dan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: nhu hieu quang - manh trung ((hoc hanh) or (hoc nganh)) cong dan ((toan tai) or (toan cao))*.