Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
thanh va » thanh van, hanh va, thanh ha
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat cau » phan cau, pha cau, phap cau

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 - canh ((thanh va) or (trinh va)) dung cong tac phat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh ((thanh va) OR (trinh va)) dung cong tac phat cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh ((thanh va) or (trinh va)) dung cong tac phat cau*.