Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
trong dang » truong dang, trong dan, trong dong
dang toan » dang tran, dan toan, dung toan
doc hieu » toc thieu, hoc thieu, hoc hien
hieu cua » hieu qua, dieu cua, bieu cua
tinh ung » tinh dung, trinh ung, tinh hung
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu cua - nhanh tinh ung dung trong dang toan cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu cua - nhanh tinh ung dung trong dang toan cau*.