Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
tranh ung » trinh ung, tranh nhung, tranh quang
dung cong » dung trong
tac trong » cay trong, hoc trong
cong tac » cong ty
trot » tot, tro, troi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet anh - canh tranh ung dung cong tac trong trot~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - canh tranh ung dung cong tac trong trot*.