Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
hanh tram » hanh trang, thanh tran, thanh tra
hanh tam » thanh tam, nhanh tam, hanh lam
tong tac » tuong tac, trong tac, cong tac
tac phan » tac pham, tai phan, tac phat
phan tap » phan lap, han tap, pha tap
van han » van hanh, van phan, van nhan

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 tinh - ((hanh tram) or (hanh tam)) van han tong tac phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - ((hanh tram) OR (hanh tam)) van han tong tac phan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - ((hanh tram) or (hanh tam)) van han tong tac phan tap*.