Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
tran hoang » tran hong, quan hoang, tran quang
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
trinh han » trinh quan
cong tan » cong tac, cong san, cong thanh
sinh va » sinh vat, tinh va, dinh van

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 ((trinh cua) or (sinh va)) hang cong tan ((tran hoang) or (trinh han))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh ((trinh cua) OR (sinh va)) hang cong tan ((tran hoang) OR (trinh han)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((trinh cua) or (sinh va)) hang cong tan ((tran hoang) or (trinh han))*.