Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
quang cua » quang tuan, quang huy, dung cua
dung cong » dung trong
quan cua » quan luan, ban cua, gian cua
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - nhanh ((quang cua) OR (quan cua)) dung cong tan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - nhanh ((quang cua) or (quan cua)) dung cong tan ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - nhanh ((quang cua) or (quan cua)) dung cong tan ((toan cau) OR (toan ban))*.