Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
trinh quan » tinh quang, trinh luat, trinh han
dang duong » dong duong, dang dung, dang cuong
duong manh » duong van
hoc thien » hoc hien, hoc thieu, hoc thiet
manh toan » thanh toan, anh tuan, tinh toan
toan cao » toan ban, toan tap
tinh va » tich va, trinh van, trinh vat

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 quan)) dang duong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - nhanh ((tinh va) OR (trinh quan)) dang duong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - nhanh ((tinh va) or (trinh quan)) dang duong manh toan cao*.