Perhaps you should try some spelling variations:
trinh nhan » trinh han, trinh phan, trinh nha
cong thang » cong thanh, cang thang, cong thong
hoc thieu » toc thieu, hoc hien
thieu anh » thien anh, chieu xanh, thien danh
thuc dung » thuoc dung, thuy dung, thuat dung
tuc dung » tac dung, duc dung, thuoc dung
cong tan » cong tac, cong san, cong thanh
phan lap » phan dau

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 anh - trinh nhan ((thuc dung) OR (tuc dung)) ((cong thang) or (cong tan)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu anh - trinh nhan ((thuc dung) OR (tuc dung)) ((cong thang) OR (cong tan)) phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu anh - trinh nhan ((thuc dung) OR (tuc dung)) ((cong thang) or (cong tan)) phan lap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu anh - trinh nhan ((thuc dung) OR (tuc dung)) ((cong thang) or (cong tan)) phan lap*.