Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
ho chieu » theo chieu, doi chieu, mot chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan 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 thieu) or (ho chieu)) xanh - hanh ((trung cua) or (tranh cua)) cong cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (ho chieu)) xanh - hanh ((trung cua) OR (tranh cua)) cong cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (ho chieu)) xanh - hanh ((trung cua) or (tranh cua)) cong cong tac toan tap*.