Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
hoc diep » hong diep, ngoc diep, khac diep
hoc dieu » hoc thieu, hoc hien
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc diep) or (hoc dieu)) tinh - hanh trinh quan nhung cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc diep) OR (hoc dieu)) tinh - hanh trinh quan nhung cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((hoc diep) or (hoc dieu)) tinh - hanh trinh quan nhung cong san ((toan cao) or (toan ban))*.