Perhaps you should try some spelling variations:
thuyet tach » thuyet mach, thuyet hach, thuyet xac
hoc thuyet » hoc chuyen
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
cong tanh » cong thanh, cong tinh, cong danh
cong tan » cong tac, cong san, cong thanh
tuan tu » tuan thu, tran tu, toan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet tach - hanh trinh quan nhung ((cong tanh) or (cong tan)) tuan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet tach - hanh trinh quan nhung ((cong tanh) OR (cong tan)) tuan tu.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet tach - hanh trinh quan nhung ((cong tanh) or (cong tan)) tuan tu*.