Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
trinh van » trinh han, trinh quan, trinh toan
dung cong » dung trong
cong anh » cong danh, dong anh, hong anh
tuan cao » toan cao, juan cao, quang cao
tinh va » tich va, trinh vat, tinh gia

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - nhanh ((tinh va) or (trinh van)) dung cong anh tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - nhanh ((tinh va) OR (trinh van)) dung cong anh tuan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - nhanh ((tinh va) or (trinh van)) dung cong anh tuan cao*.